86.67% is what you get when you turn the fraction 52/60 into a percentage. This number tells you how much of a whole 52 parts out of 60 represent.
The fraction 52/60 can be simplified to 13/15, which still gives the same percentage. Seeing it as a percent makes it easy to compare with other values, like grades or test scores.
In everyday use, saying something is 86.67% complete is clearer than saying it’s 52 out of 60. It helps people quickly understand the proportion without doing the math themselves.