16 kg
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28 = 4 x 7 so 4 = 1 seventh of 28 6 x 4 will therefore = 6 sevenths of 28, and as we know, 6 x 4 = 24
28 x 4/7 = 16
It is: 4/7+3/4 = 37/28 or 1 and 9/28 as a mixed number
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.
2/7 plus 1/4 is the same as 8/28+7/28 = 15/28