Sasi Math (Revised for 1024)

Scroll:Percentage >> Percentage >> ps (2899)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.

Karna saves 40% of his salary. When his salary is reduced by 20%, his savings is reduced by $760. How much is his salary at first

$ ___

Answer:_______________

Mr Tan always gives 25% of his income to his wife. When his income is increased by 60%, he gives her $975 more. Find his income before the increase.

$ ___

Answer:_______________

Mr Singh always gives 35% of his income to his wife. When his income is increased by 40%, he gives her $546 more. Find his income before the increase.

$ ___

Answer:_______________

Mr Richard always gives 35% of his income to his wife. When his income is increased by 20%, he gives her $357 more. Find his income before the increase.

$ ___

Answer:_______________

Selvanayaki saves 60% of her salary. When her salary is reduced by 20%, her savings is reduced by $576. How much is her salary at first

$ ___

Answer:_______________

Moorthi saves 40% of his salary. When his salary is reduced by 35%, his savings is reduced by $476. How much is his salary at first

$ ___

Answer:_______________

Mr Tan always gives 60% of his income to his wife. When his income is increased by 60%, he gives her $648 more. Find his income before the increase.

$ ___

Answer:_______________

Mr Singh always gives 40% of his income to his wife. When his income is increased by 40%, he gives her $800 more. Find his income before the increase.

$ ___

Answer:_______________

Mr Richard always gives 25% of his income to his wife. When his income is increased by 20%, he gives her $970 more. Find his income before the increase.

$ ___

Answer:_______________

10)

Indra saves 60% of her salary. When her salary is reduced by 30%, her savings is reduced by $216. How much is her salary at first

$ ___

Answer:_______________

Karna saves 40% of his salary. When his salary is reduced by 20%, his savings is reduced by $760. How much is his salary at first

Answer: $9500

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 20%
		= 80%
Step 2:	40% of 80%	= $\frac{40}{100}$ x $\frac{80%}{1}$
		= 32%
Step 3:	Difference	→40% - 32%
		= 8%
Step 4:	8%	→$760
	1%	→ $\frac{$760}{8%}$
	100%	→ $\frac{$760}{8%}$ x $\frac{100%}{1}$
		= $9500

Mr Tan always gives 25% of his income to his wife. When his income is increased by 60%, he gives her $975 more. Find his income before the increase.

Answer: $6500

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→160%
Step 2:	25% of 160%	= $\frac{25}{100}$ x $\frac{160%}{1}$
		= 40%
Step 3:	Difference	→40% - 25%
		= 15%
Step 4:	15%	→$975
	1%	→ $\frac{$975}{15%}$
	100%	→ $\frac{$975}{15%}$ x $\frac{100%}{1}$
		= $6500

Mr Singh always gives 35% of his income to his wife. When his income is increased by 40%, he gives her $546 more. Find his income before the increase.

Answer: $3900

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→140%
Step 2:	35% of 140%	= $\frac{35}{100}$ x $\frac{140%}{1}$
		= 49%
Step 3:	Difference	→49% - 35%
		= 14%
Step 4:	14%	→$546
	1%	→ $\frac{$546}{14%}$
	100%	→ $\frac{$546}{14%}$ x $\frac{100%}{1}$
		= $3900

Mr Richard always gives 35% of his income to his wife. When his income is increased by 20%, he gives her $357 more. Find his income before the increase.

Answer: $5100

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→120%
Step 2:	35% of 120%	= $\frac{35}{100}$ x $\frac{120%}{1}$
		= 42%
Step 3:	Difference	→42% - 35%
		= 7%
Step 4:	7%	→$357
	1%	→ $\frac{$357}{7%}$
	100%	→ $\frac{$357}{7%}$ x $\frac{100%}{1}$
		= $5100

Selvanayaki saves 60% of her salary. When her salary is reduced by 20%, her savings is reduced by $576. How much is her salary at first

Answer: $4800

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 20%
		= 80%
Step 2:	60% of 80%	= $\frac{60}{100}$ x $\frac{80%}{1}$
		= 48%
Step 3:	Difference	→60% - 48%
		= 12%
Step 4:	12%	→$576
	1%	→ $\frac{$576}{12%}$
	100%	→ $\frac{$576}{12%}$ x $\frac{100%}{1}$
		= $4800

Moorthi saves 40% of his salary. When his salary is reduced by 35%, his savings is reduced by $476. How much is his salary at first

Answer: $3400

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 35%
		= 65%
Step 2:	40% of 65%	= $\frac{40}{100}$ x $\frac{65%}{1}$
		= 26%
Step 3:	Difference	→40% - 26%
		= 14%
Step 4:	14%	→$476
	1%	→ $\frac{$476}{14%}$
	100%	→ $\frac{$476}{14%}$ x $\frac{100%}{1}$
		= $3400

Mr Tan always gives 60% of his income to his wife. When his income is increased by 60%, he gives her $648 more. Find his income before the increase.

Answer: $1800

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→160%
Step 2:	60% of 160%	= $\frac{60}{100}$ x $\frac{160%}{1}$
		= 96%
Step 3:	Difference	→96% - 60%
		= 36%
Step 4:	36%	→$648
	1%	→ $\frac{$648}{36%}$
	100%	→ $\frac{$648}{36%}$ x $\frac{100%}{1}$
		= $1800

Mr Singh always gives 40% of his income to his wife. When his income is increased by 40%, he gives her $800 more. Find his income before the increase.

Answer: $5000

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→140%
Step 2:	40% of 140%	= $\frac{40}{100}$ x $\frac{140%}{1}$
		= 56%
Step 3:	Difference	→56% - 40%
		= 16%
Step 4:	16%	→$800
	1%	→ $\frac{$800}{16%}$
	100%	→ $\frac{$800}{16%}$ x $\frac{100%}{1}$
		= $5000

Mr Richard always gives 25% of his income to his wife. When his income is increased by 20%, he gives her $970 more. Find his income before the increase.

Answer: $19400

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→120%
Step 2:	25% of 120%	= $\frac{25}{100}$ x $\frac{120%}{1}$
		= 30%
Step 3:	Difference	→30% - 25%
		= 5%
Step 4:	5%	→$970
	1%	→ $\frac{$970}{5%}$
	100%	→ $\frac{$970}{5%}$ x $\frac{100%}{1}$
		= $19400

10)

Indra saves 60% of her salary. When her salary is reduced by 30%, her savings is reduced by $216. How much is her salary at first

Answer: $1200

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 30%
		= 70%
Step 2:	60% of 70%	= $\frac{60}{100}$ x $\frac{70%}{1}$
		= 42%
Step 3:	Difference	→60% - 42%
		= 18%
Step 4:	18%	→$216
	1%	→ $\frac{$216}{18%}$
	100%	→ $\frac{$216}{18%}$ x $\frac{100%}{1}$
		= $1200