Question

Which of the following is the ratio between a number
and the number obtained by adding one-fifth of that
number to it?
​

Answer 1

Answer:

$let \: the \: no. \: be \: x \: and \: \frac{1}{5} \: of \: that \: no = \frac{x}{5}$

$ratio \: required \:  : \: \frac{x}{x + \frac{x}{5} } = \frac{x}{ \frac{6x}{5} } = \frac{5}{6} = \: 5 :6$