Question

A boy is 11-year old and has 80% of his full height. He is 120 cm tall . Calculate his full height at the end of his growth period​

Answer 1

Answer:

80% of x is 120

x= 120×100/80= 150 cm

total height is 150 cm

Answer 2

Answer:

150cm

Explanation:

Take the full height of him as 'x'

So it's given, that he has had his 80% growth, and that's 120cm.

So:  80 % of 'X'= 120  

(80÷100) × X= 120 [ 80 is divided by hundred as percent is there and it is multiplied by X]

So, 0.8 × X= 120 [ It's 0.8 as 80 is divided by 100]  

X= 120 ÷0.8

X=150

Therefore the full growth of the boy is 150 cm.

Hope it will help you :)