Question

if 11%of a number exceeds 7% of the number by 18, the number is

Answer 1

(c) 450

Let x be the number.
(11% of x) − (7% of x) = 18
⇒11x100-7x100=18
⇒ 4x100=18
∴ x = 18×1004=18×25=450
Hence, the required number is 450

Answer 2

11% of x- 7% of x=18

11×100- 7×100=18

4×100=18

x=18×1004=18×25=450