Question

What number should be added to -5/7 to get -2/3?​

Answer 1

Ans.

Let us consider a number as x to be added to -5/7 to get -2/3

So, -5/7 + x = -2/3

x = -2/3 + 5/7

let us take LCM for 3 and 7 which is 21

x = (-2×7 + 5×3)/21

= (-14 + 15)/21

= 1/21

∴ the required number is 1/21

Answer 2

Step-by-step explanation:

$\frac{ - 2}{3} - \frac{ - 5}{7}$

$lcm \: = 21$

$\frac{ - 2 \times 7}{3 \times 7} = \frac{ - 14}{21}$

$\frac{ - 5 \times 3}{7 \times 6} = \frac{ - 15}{21}$

$\frac{ - 14 - (-15 )}{21} = \frac{ - 14 + 15 }{21}$

$= \frac{1}{21}$

hope it will help you

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