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

Question : 1

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 : 2

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

Question : 3

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

a) 18

b) 81

c) 80

d) 45

Question : 4

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%

Question : 5

Salary of a person is first increased by 20%, then it is decreased by 20%. Percentage change in his salary is :

a) 4% increased

b) 20% increased

c) 8% decreased

d) 4% decreased

Question : 6

A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?

a) 26%

b) 28%

c) 27%

d) 25%