Question

What number increased by 8% of itself gives 1620?

Answer 1

Let the number be x.
Therefore,

`x + (8)/(100)x xx` = 1620

⇒ `(100x + 8x)/(100)` = 1620

⇒ 108x = 1620 x 100

⇒ x = `(1620 xx 100)/(108)`
⇒ x = 1500
Hence, 1500 is the number.