45/61 as a percentage is 73.77%. This is the rounded value you get when you express the fraction as a part of one hundred.
The fraction 45/61 is a proper fraction, meaning the numerator is smaller than the denominator. It sits a little below three‑quarters, which is 0.75 or 75%, so the percentage we get is just a bit lower than that benchmark.
You might see a number like 45/61 in situations such as a test score, where a student answered 45 out of 61 questions correctly. Saying the result as 73.77% makes it easy to compare with other scores that are already in percent form.
Because we round to two decimal places, the exact decimal could be a tiny bit different, but 73.77% is the standard way to report it in most everyday contexts.