21/42 expressed as a percentage is 50.00%. This fraction simplifies to 1/2, which is exactly half of a whole, so the percentage reflects that half‑value.
When you think of 21 out of 42 parts, you’re looking at an even split—half the pieces are counted. That’s why the number shows up as a clean 50 percent, a round figure that’s easy to understand.
In everyday use, you can say that 21/42 equals 50 % without worrying about complex math. It’s a handy way to communicate that something is right in the middle, neither more nor less than the total.
