25/86 is about 29.07% when you turn the fraction into a percent. This rounded figure lets you see the size of the part in everyday terms.
The fraction 25/86 is a little more than one quarter of a whole. If you think of 86 equal pieces, 25 of those pieces would be taken, which is just under a third of the total.
Seeing the percentage helps when you compare numbers. For example, if a class of 86 students has 25 who passed a test, about 29 % of the class succeeded.
In practical use, you can quickly estimate the amount without doing the division each time. The rounded 29.07 % is easy to remember and works well for most everyday calculations.