Question

divide the sum of 5 / 21 and 4 / 7 by their difference​

Answer 1

Step-by-step explanation:

sum,

5 / 21 + 4 / 7 =

here first we will take LCM

LCM is 21 .

so,

5/21 + 12/21 = 17 / 21.

now subtraction,

also here we will take LCM.

5/21 - 12/21 = -7/21 = -3/7.

now division,

17/21 ÷ -3/7 = - 17/9.

so answer is -17/9.

hope it helps you............