Exercise 12.1

 

1. Write each of the following as percent:

 

(i) Solution: 

 

= 62.5%

(iv) 0.8

 = 0.8 (100)

= 80%

(v) 0.005

 = 0.005 (100)

= 0.5%

(vi) 3:25

(vii) 11:80

 = 13.75%

(viii) 111:125

(ix) 13:75

(x) 15:16

 (xi) 0.18

 = 0.18(100)

= 18%

2. Convert the following percentages to fractions and ratios:

Solution:

(i) 25%

(ii)  2.5%

(iii) 0.3%

(iv) 125%

3. Express the following as decimal fractions:

Solution:

(i) 27%

(ii) 6.3%

(iii) 32%

(iv) 0.25

(v) 7.5%