To find out what percentage 21 is out of 25, you can use a simple formula. The formula to calculate the percentage is:
(Part / Whole) × 100
In this case, 21 is the part and 25 is the whole. Plugging these values into the formula:
(21 / 25) × 100 = 84%
So, 21 out of 25 is 84%. This means that 21 is 84% of 25.