40/80 as a percentage is 50.00%. This simple fraction reduces to one‑half, which is exactly half of a whole, and half of 100% is 50.00%.
In everyday terms, 40 out of 80 means you have fifty percent of the total amount. Whether you’re looking at a test score, a discount, or a portion of a recipe, the value stays the same: half of whatever you’re measuring.
Remember that percentages are just another way to show parts of a whole. So whenever you see 40/80, you can think of it instantly as 50.00% without needing any extra calculations.