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

Question : 1

A number is increased by 20% and then it is decreased by 10%. Find the net increase or decrease per cent.

a) 10% decrease

b) 8% decrease

c) 8% increase

d) 10% increase

Question : 2

The numerator of a fraction is increased by 20% and denominator is decreased by 20%. The value of the fraction becomes $4/5$. The original fraction is

a) $8/15$

b) $4/5$

c) $7/11$

d) $2/3$

Question : 3

The price of an article was decreased by 10% and again reduced by 10%. By what per cent should the price have been reduced once, in order to produce the same effect as these two successive reductions ?

a) 19%

b) 25%

c) 20%

d) 15%

Question : 4

If each side of a cube is increased by 10% the volume of the cube will increase by

a) 10%

b) 25%

c) 33.1%

d) 30%

Question : 5

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 : 6

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