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

Question : 1

A number reduced by 25% becomes 225. What per cent should it be increased so that it becomes 375?

a) 30%

b) 75%

c) 35%

d) 25%

Question : 2

A number is increased by 10% and then it is decreased by 10%. The net change in the number is

a) 2% decrease

b) 1% decrease

c) 1% increase

d) no increase or decrease

Question : 3

If price of a book is first decreased by 25% and then increased by 20%, the net change in the price of the book will be

a) 5% decrease

b) 5% increase

c) no change

d) 10% decrease

Question : 4

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 : 5

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 : 6

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