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

Question : 1

The tax imposed on an article is decreased by 10% and its consumption increases by 10%. Find the percentage change in revenue from it.

a) 2% decrease

b) 11% increase

c) 1% decrease

d) 10% increase

Question : 2

When the price of cloth was reduced by 25%, the quantity of cloth sold increased by 20%. What was the effect on gross receipt of the shop?

a) 5% decrease

b) 10% decrease

c) 10% increase

d) 5% increase

Question : 3

A number is first increased by 10% and then it is further increased by 20%. The original number is increased altogether by

a) 15%

b) 36%

c) 32%

d) 30%

Question : 4

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 : 5

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

a) 18

b) 81

c) 80

d) 45

Question : 6

The cost of an article worth Rs.100 is increased by 10% first and again increased by 10%. The total increase in rupees is

a) 21

b) 121

c) 110

d) 20