Q: What is three sevenths of a number if it equals 21?

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21

the answer is 21.

3 / 1/7 = 3 x 7 = 21 Therefore, there are 21 sevenths in three wholes.

3/7 x 21 = 9

21

make the lower number the same 3/7 x 8/8 = 24/56 3/8 x 7/7 = 21/56 so three sevenths is bigger

7

20/21

49

Expressed as a mixed number in its simplest form, 30/21 is equal to 1 3/7 or one and three sevenths.

21 over 8

If: 3x = 21 then x = 7