Question

Write each of the following as percentage.

(i) 7/25

(ii) 14/625

(iii) 5/8

(iv) 0.8

(v) 0.005

(vi) 3:25

(vii) 11: 80

(viii) 111: 125

(ix) 13: 75

(x) 15: 16

(xi) 0.18

(xii) 7/125

Answer 1

(i) 7/25

To change any number to percentage we have to multiply that number by 100,

i.e., 7/25 × 100 = 28%

(ii) 14/625

To change any number to percentage we have to multiply that number by 100,

i.e., 14/625 × 100 = 56/25 = 2.24%

(iii) 5/8

To change any number to percentage we have to multiply that number by 100,

i.e., 5/8 × 100 = 125/2 = 62.5%

(iv) 0.8

To change any number to percentage we have to multiply that number by 100,

i.e., 0.8 can be written as 8/10

so, 8/10 × 100 = 80%

(v) 0.005

To change any number to percentage we have to multiply that number by 100,

i.e., 0.005 can be written as 5/1000

so, 5/1000 × 100 = 5/10 = 0.5%

(vi) 3:25

To change any number to percentage we have to multiply that number by 100,

i.e., 3/25 × 100 = 3 × 4 = 12%

(vii) 11 : 80

To change any number to percentage we have to multiply that number by 100,

i.e., 11/80 × 100 = 55/4 = 13.75%

(viii) 111 : 125

To change any number to percentage we have to multiply that number by 100,

i.e., 111/125 × 100 = 444/5 = 88.8%

(ix) 13 : 75

To change any number to percentage we have to multiply that number by 100,

i.e., 13/75 × 100 = 52/3 = 17.3%

(x) 15 : 16

To change any number to percentage we have to multiply that number by 100,

i.e., 15/16 × 100 = 375/4 = 93.75%

(xi) 0.18

To change any number to percentage we have to multiply that number by 100,

i.e., 0.18 can be written as 18/100

so, 18/100 × 100 = 18%

(xii) 7/125

To change any number to percentage we have to multiply that number by 100,

i.e., 7/125 × 100 = 28/5 = 5.6%