Question

A's height is more than B's height by 20%. By what per cent is B's height less than A's height?

Answer 1

A= B×1.2
$\frac{A}{1.2}$=B
A×0.8=B

therefore b is 20 % less than A

Answer 2

If A's height is 100% and it is 20% more than B, then B's height is 100% - 20% = 80%.
Therefore, B's height is less than that of A by 20%