Question

4 Find the whole quantity it
@ 75% of what number is 15
@ 25% of what number is a​

Answer 1

a) let the number be x

75% of x = 15

= x = 15×100/75

= x = 20

The answer is 20.

b) let the number be x

= 25%of x = a

= x = a×100/25

= x = 4a

The number is 4a.

Answer 2

Answer:

1. 20

2. 4a

Step-by-step explanation:

1. x× 75/100 = 15

x = 100×15/75

on solving x=20

therefore answer is 20

2. x ×25/100 =a

x = 100a/25

on solving x=4a

therefore answer is 4a