The fraction 4/40 expressed as a percentage is 10.00%. This tells you that the part represented by 4 out of a total of 40 is exactly one‑tenth of the whole.
In everyday terms, if you had 40 pieces of something and you took 4 pieces, you would be holding 10 % of the total. That makes it easy to compare with other percentages you might see.
Since 4 divided by 40 reduces to 1/10, the percentage stays simple: one part in ten is always 10 %. You’ll find this ratio useful when you need a quick estimate.
Remember, whenever you see a fraction that simplifies to 1/10, you can instantly think of 10.00% without doing any extra math.
