What number is 9 less than 99?

When solving a question like "What number is 9 less than 99?", take a close look at what it is really asking.

You have the number 99 and you are looking for a number that is 9 less than 99. In other words, if you have 99 and take away 9, then how many do you have?

You guessed it! This is a subtraction problem. 99 is the minuend and 9 is subtrahend and the answer we are looking for is the difference.

Therefore, to solve "What number is 9 less than 99?", you subtract 9 from 99 like so:

99 - 9 = 90

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