The difference between two things is the way in which they are unlike each other.

the degree to which one person or thing differs from another: [countable; usually singular] The difference in their ages is about six months. [uncountable] There isn't much difference between one politician and another.

Percentage difference is usually calculated when you want to know the difference in percentage between two numbers. For this calculator, the order of the numbers does not matter as we are simply dividing the difference between two numbers by the average of the two numbers.

In math, a difference is the remainder left after subtracting one number from another. Chimps and gorillas are both apes, but there are a lot of differences between them.

To tell the difference between two people or things is to see how they are unlike each other. It's hard to tell the difference [= distinguish] between one action movie and another. The new version is supposed to be much better than the old one, but I can't tell the difference (between them).

Difference is the most general, applying to things small or great, internal or external. Distinction is generally, but not always, external, and generally marks delicate differences: as, the distinction between two words that are almost synonymous.

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