Question

What should be added -4/7 to get 3/21 ?

Answer 1

Let the number be x

Given,

-4/7 + x = 3/21

x = 3/21 + 4/7

x = 15/21

Therefore, 15/21 should be added to -4/7 to get 3/21.

Hope it helps!

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Answer 2

Answer:

$\frac{5}{7}$

Step-by-step explanation:

let x be added

$= - \frac{4}{7} + x = \frac{3}{21} \\ = \frac{7x - 4}{7} = \frac{3}{21} \\ = 7x - 4 = \frac{3 \times 7}{21} \\ = 7x - 4 = 1\\ = 7x = 5 \\ = x = \frac{</strong><strong>5</strong><strong>}{</strong><strong>7</strong><strong>}$