36/71 is about 50.70% when you turn the fraction into a percentage. It’s a handy way to see how big the part is compared to a whole.
The fraction 36/71 can be thought of as 36 pieces out of 71 equal pieces. When you look at it as a percent, you get a little more than half of the whole, which is why it rounds to 50.70%.
If you ever need to compare this fraction to other numbers, using the percentage makes it easier. You can quickly see that 36/71 is just under the halfway point of 100%.