Question

What number decreased by 18% of itself gives 1599?

Answer 1

Let the number be x.
Therefore,

`x - (18)/(100) xx x` = 1599

⇒ `(100x - 18x)/(100)` = 1599

⇒ 82x = 1599 x 100

⇒ x = `(1599 xx 100)/(82)`
⇒ x = 1950
Hence, 1950 is the number.