21 times what equals 78?

21 times what equals 78? In other words, what do you multiply by 21 to get 78? If "x" is "what" in the sentence, "21 times what equals 78?", then the equation to solve the problem is as follows:

21 • x = 78

Which can be written as:

21x = 78

To solve the equation above, we need to remove the 21 on the left side to make the x alone. To do that, we divide both sides by 21.

21x/21 = 78/21

21x/21 is x and 78/21 is 3.7143 which means our equation will look like this:

x = 3.7143

Thus, the answer to "21 times what equals 78?" is 3.7143.

To double-check our work, multiply 3.7143 by 21 to see that it equals 78. (Note that our answer on this page is rounded to 4 digits if necessary.)

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21 times what equals 79?
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