# How do we express the ratio 1:3.75 as a ratio of whole numbers?

Sep 17, 2016

$1 : 3.75 = 4 : 15$

#### Explanation:

Ratio is generally with whole numbers, but here we have one number as $3.75$, which is a mixed fraction in which we have $0.75$ as fractional part.

In ratios if we multiply by a common number, it remains same. Hence, let us multiply by a number which makes it whole.

It is apparent that if we multiply $0.75$ by $4$, it becomes whole.

Hence $1 : 3.75$

= 1×4:3.75×4

= 4:(12+0.75×4)

= $4 : \left(12 + 3\right)$

= $4 : 15$