In mathematics, a math ratio is a relationship between two numbers of the same kind expressed as "a to b" or a:b.
The online ratio calculator give you the ratio like this "2:3 = 1:1.5 = 0.6666666666666666:1", It is how many times the first number contains the second. Sometimes expressed arithmetically as a dimensionless quotient of the two.
For example: 5:20 = 1:4 = 0.25:1, 5:40 = 1:8 = 0.125:1.