What is 72.1 repeating as a fraction?

72 is composed of (72 x 9) = 648 ninths

0.111 ... repeating is the decimal for 1 ninth.

So 72.1 ... all crammed into one improper fraction is 649/9.

As a mixed number, it's (72 and 1/9).

72.1 = 72.1 / 1

Numerator = 72.1 * 10 = 721

Denominator = 1 * 10 = 10

Numerator / Denominato = 721 / 10

The simplified fraction is

= 721/10

= 72 1/10