What number is 15 less than 40?

When solving a question like "What number is 15 less than 40?", take a close look at what it is really asking.

You have the number 40 and you are looking for a number that is 15 less than 40. In other words, if you have 40 and take away 15, then how many do you have?

You guessed it! This is a subtraction problem. 40 is the minuend and 15 is subtrahend and the answer we are looking for is the difference.

Therefore, to solve "What number is 15 less than 40?", you subtract 15 from 40 like so:

40 - 15 = 25

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