32/45 as a percentage is 71.11%. This is the rounded value you get when you turn the fraction into a percent with two decimal places.
The fraction 32/45 means you have 32 parts out of a total of 45 equal parts. When you compare that to a whole (100%), it lands just a little over the halfway point, which is why the percentage is in the low seventies.
Because we rounded to the nearest hundredth, the exact value is a bit longer, but 71.11% is the clean number most people use for quick calculations or reports.