21/42 as a percentage is 50.00%. This means that the fraction represents exactly half of a whole. When you see 50% on a chart or a label, you’re looking at the same value as 21/42.
The fraction 21/42 can be reduced by dividing both the numerator and the denominator by 21, giving you 1/2. That simple ratio is the same as saying “one part out of two” or “one half,” which matches the 50% figure.
In everyday situations, 50% shows up a lot—think of a pizza split in two equal slices, a test score where you get half the points right, or a sale where the price is cut in half. Knowing that 21/42 equals 50.00% helps you quickly understand that something is exactly at the midpoint.
