RD Sharma solution class 7 chapter 11 Percentage Exercise 11.3

Exercise 11.3

Page-11.5

Question 1:

Express each of the following per cents as decimals:
(i) 12.5%
(ii) 75%
(iii) 128.8%
(iv) 0.05%

Answer 1:

(i) 12.5% = 12.5/100 = 125/1000 = 0.125
(ii) 75% = 75/100 = 0.75
(iii) 128.8% = 128.8/100 = 1288/1000 = 1.288
(iv) 0.05% = 0.05/100 = 5/10000 = 0.0005

Question 2:

Express each of the following decimals as a per cent:
(i) 0.004
(ii) 0.24
(iii) 0.02
(iv) 0.275

Answer 2:

(i) 0.004 = (0.004 ×  100)% = 0.4%
(ii) 0.24 = (0.24 ×  100 )% =  24%
(iii) 0.02 = (0.02 ×  100)% = 2%
(iv) 0.275 = (0.275 ×  100)% =  27.5%

Question 3:

Write each of the following as whole numbers or mixed numbers:
(i) 136%
(ii) 250%
(iii) 300%

Answer 3:

(i) 136% = 136/100 = 34/25
(ii) 250% = 250/100 = 5/2
(iii) 300% = 300/100 = 3