72% = 72/100 (or 18/25 if you need to simplify) = .72
5% = 5/100 (or 1/20 if you have to simplify) = .05
5/8 = .625 = 62.5%
Anything else?
(Here's a tip, to turn a percentage into a decimal, multiply the percentage by 100. Alternatively, you could move the decimal (at the end of the whole number) two units to the left. That should get you the same answer. And to turn a decimal into a percentage, just go in reverse. Fractions are a bit more difficult depending on the denominator, but I think it's the same general idea of multiplying by 100.)
I hope that helps!