21
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∙ 7y ago3 / 1/7 = 3 x 7 = 21 Therefore, there are 21 sevenths in three wholes.
5/7 of 21 = 21*5/7 = 15
13/7 of 21 is 39.
4/7 of 21 is 12.
3/7 x 21 = 9
9 = 3/7 x 21/1 = 63/7
2/7 times 21 = 6
63/7 * 21 = 45/7 * 21 = 45*3 = 135
12/21 - 7/21 = 5/21
To divide by a fraction, multiply by its reciprocal. In this instance, 3/7 / 4/7 = 3/7 x 7/4 = 21/28 = 3/4. Therefore, three sevenths divided by four sevenths is equal to three quarters.
3/7 of 63 is 27.
2/7 of 21 is 6.