Question

to what number should 1 2/7 be added to give - 4/ 21 ?
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Answer 1

Step-by-step explanation:

it's simple substract 12/7 from 4/21

4/21-12/7

4/21-36/21

-32/21 is the answer

Answer 2

Answer:

-31/21.

Step-by-step explanation:

Let the required number be ' x ' .

Given:

x + 1 ²/7 = -4/21.

That is,

x + 9/7 = -4/21.

x = (-4/21) - (9/7).

x = (-4/21) - (27/21).

x = (-4 -27)/21 = -31/21.

Therefore,

The number is (-31/21).