model 2 net increase or decrease in % Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

A number increased by 22$1/2$% gives 98. The number is

a) 18

b) 81

c) 80

d) 45

Question : 2

The difference between the value of the number increased by 20% and the value of the number decreased by 25% is 36. Find the number.

a) 0.8

b) 80

c) 720

d) 7.2

Question : 3

The length of a rectangle is increased by 10% and breadth decreased by 10% Then the area of the new rectangle is

a) increased by 1%

b) decreased by 10%

c) decreased by 1%

d) neither decreased nor increased

Question : 4

If a number is increased by 25% and the resulting number is decreased by 25%. then the percentage increase or decrease finally is

a) decreased by $6{1}/4$%

b) increased by 6%

c) increased by $6{1}/4$%

d) no change

Question : 5

If the income tax is increased by 19%, the net income is reduced by 1%. The rate of income tax is

a) 4%

b) 7.2%

c) 5%

d) 6%

Question : 6

A man spends 75% of his income. His income increases by 20% and his expenditure also increases by 10%. The percentage of increase in his savings is

a) 30%

b) 25%

c) 50%

d) 40%