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.

Mr Richard always gives 35% of his income to his wife. When his income is increased by 20%, he gives her $798 more. Find his income before the increase.

$ ___

Answer:_______________

Tamilselvi saves 60% of her salary. When her salary is reduced by 15%, her savings is reduced by $693. How much is her salary at first

$ ___

Answer:_______________

Barathan saves 40% of his salary. When his salary is reduced by 10%, his savings is reduced by $836. How much is his salary at first

$ ___

Answer:_______________

Mr Singh always gives 30% of his income to his wife. When his income is increased by 40%, he gives her $708 more. Find his income before the increase.

$ ___

Answer:_______________

Mr Tan always gives 30% of his income to his wife. When his income is increased by 60%, he gives her $468 more. Find his income before the increase.

$ ___

Answer:_______________

Mr Richard always gives 20% of his income to his wife. When his income is increased by 20%, he gives her $588 more. Find his income before the increase.

$ ___

Answer:_______________

Tulasi saves 60% of her salary. When her salary is reduced by 20%, her savings is reduced by $252. How much is her salary at first

$ ___

Answer:_______________

Sriram saves 40% of his salary. When his salary is reduced by 15%, his savings is reduced by $246. How much is his salary at first

$ ___

Answer:_______________

Mr Singh always gives 30% of his income to his wife. When his income is increased by 40%, he gives her $576 more. Find his income before the increase.

$ ___

Answer:_______________

10)

Mr Tan always gives 40% 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 Richard always gives 35% of his income to his wife. When his income is increased by 20%, he gives her $798 more. Find his income before the increase.

Answer: $11400

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%	→$798
	1%	→ $\frac{$798}{7%}$
	100%	→ $\frac{$798}{7%}$ x $\frac{100%}{1}$
		= $11400

Tamilselvi saves 60% of her salary. When her salary is reduced by 15%, her savings is reduced by $693. How much is her salary at first

Answer: $7700

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 15%
		= 85%
Step 2:	60% of 85%	= $\frac{60}{100}$ x $\frac{85%}{1}$
		= 51%
Step 3:	Difference	→60% - 51%
		= 9%
Step 4:	9%	→$693
	1%	→ $\frac{$693}{9%}$
	100%	→ $\frac{$693}{9%}$ x $\frac{100%}{1}$
		= $7700

Barathan saves 40% of his salary. When his salary is reduced by 10%, his savings is reduced by $836. How much is his salary at first

Answer: $20900

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 10%
		= 90%
Step 2:	40% of 90%	= $\frac{40}{100}$ x $\frac{90%}{1}$
		= 36%
Step 3:	Difference	→40% - 36%
		= 4%
Step 4:	4%	→$836
	1%	→ $\frac{$836}{4%}$
	100%	→ $\frac{$836}{4%}$ x $\frac{100%}{1}$
		= $20900

Mr Singh always gives 30% of his income to his wife. When his income is increased by 40%, he gives her $708 more. Find his income before the increase.

Answer: $5900

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→140%
Step 2:	30% of 140%	= $\frac{30}{100}$ x $\frac{140%}{1}$
		= 42%
Step 3:	Difference	→42% - 30%
		= 12%
Step 4:	12%	→$708
	1%	→ $\frac{$708}{12%}$
	100%	→ $\frac{$708}{12%}$ x $\frac{100%}{1}$
		= $5900

Mr Tan always gives 30% of his income to his wife. When his income is increased by 60%, he gives her $468 more. Find his income before the increase.

Answer: $2600

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→160%
Step 2:	30% of 160%	= $\frac{30}{100}$ x $\frac{160%}{1}$
		= 48%
Step 3:	Difference	→48% - 30%
		= 18%
Step 4:	18%	→$468
	1%	→ $\frac{$468}{18%}$
	100%	→ $\frac{$468}{18%}$ x $\frac{100%}{1}$
		= $2600

Mr Richard always gives 20% of his income to his wife. When his income is increased by 20%, he gives her $588 more. Find his income before the increase.

Answer: $14700

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→120%
Step 2:	20% of 120%	= $\frac{20}{100}$ x $\frac{120%}{1}$
		= 24%
Step 3:	Difference	→24% - 20%
		= 4%
Step 4:	4%	→$588
	1%	→ $\frac{$588}{4%}$
	100%	→ $\frac{$588}{4%}$ x $\frac{100%}{1}$
		= $14700

Tulasi saves 60% of her salary. When her salary is reduced by 20%, her savings is reduced by $252. How much is her salary at first

Answer: $2100

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%	→$252
	1%	→ $\frac{$252}{12%}$
	100%	→ $\frac{$252}{12%}$ x $\frac{100%}{1}$
		= $2100

Sriram saves 40% of his salary. When his salary is reduced by 15%, his savings is reduced by $246. How much is his salary at first

Answer: $4100

SOLUTION 1 :

Step 1:	Before the reduction	→100%
	After the reduction	→100% - 15%
		= 85%
Step 2:	40% of 85%	= $\frac{40}{100}$ x $\frac{85%}{1}$
		= 34%
Step 3:	Difference	→40% - 34%
		= 6%
Step 4:	6%	→$246
	1%	→ $\frac{$246}{6%}$
	100%	→ $\frac{$246}{6%}$ x $\frac{100%}{1}$
		= $4100

Mr Singh always gives 30% of his income to his wife. When his income is increased by 40%, he gives her $576 more. Find his income before the increase.

Answer: $4800

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→140%
Step 2:	30% of 140%	= $\frac{30}{100}$ x $\frac{140%}{1}$
		= 42%
Step 3:	Difference	→42% - 30%
		= 12%
Step 4:	12%	→$576
	1%	→ $\frac{$576}{12%}$
	100%	→ $\frac{$576}{12%}$ x $\frac{100%}{1}$
		= $4800

10)

Mr Tan always gives 40% 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: $2700

SOLUTION 1 :

Step 1:	Before the increase	→100%
	After the increase	→160%
Step 2:	40% of 160%	= $\frac{40}{100}$ x $\frac{160%}{1}$
		= 64%
Step 3:	Difference	→64% - 40%
		= 24%
Step 4:	24%	→$648
	1%	→ $\frac{$648}{24%}$
	100%	→ $\frac{$648}{24%}$ x $\frac{100%}{1}$
		= $2700