A ratio (:) is the relation between two like numbers. For example, the ratio 5:7 can be written as a fraction, 5/7, or as division 5 ÷ 7. We read the ratio 5:7 as 5 to 7 or 5 per 7.
A ratio can be expressed by a fraction
or by a colon (:). So, the ratio of two numbers a
can be written as a
which is the same as the fraction
, where b