21
3 / 1/7 = 3 x 7 = 21 Therefore, there are 21 sevenths in three wholes.
5/7 of 21 = 21*5/7 = 15
4/7 of 21 is 12.
13/7 of 21 is 39.
To find how many sevenths are in 3, you can divide 3 by ( \frac{1}{7} ). This is equivalent to multiplying 3 by 7, which gives you 21. Therefore, there are 21 sevenths in 3.
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 find out how many two-sevenths are in 6 wholes, we need to first convert the wholes into sevenths. Since there are 7 sevenths in a whole, 6 wholes would be equal to 6 x 7 = 42 sevenths. Next, we divide the total sevenths by the denominator of the fraction we are looking for, which is 7 in this case. So, 42 sevenths divided by 2 sevenths equals 21. Therefore, there are 21 two-sevenths in 6 wholes.
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.