Question

Picture shown is the answer the answer D. ?

Answer 1

Your answer is B. 17/28
To subtract fractions, it is the same as adding fractions in the way that you need a common denominator. The lowest common multiple of 4 and 7 is 28, so, after cross-multiplying we get 21/28 - 4/28, and 21 - 4 = 17, so your final answer is 17/28.

I hope this helps!

Answer 2

$\dfrac{3}{4} - \dfrac{1}{7}= \dfrac{3 \times 7 - 4 \times 1}{4 \times 7}= \dfrac{21-4}{28}= \dfrac{17}{28}$

The answer is B.

Hope it helps!