Question

find the sum of
5/-7and 4/-21​

Answer 1

Answer:

5/-7 and 4/-21

first convert minus sign to numerator

-5/7&-4/21

Multiply -5/7 ×3/3=-15/21

we can write -13/21,-12/21,-11/21,-10/21,-9/21,-8/21/-7/21,-6/21,-5/21

Answer 2

Answer:

-19/21

Step-by-step explanation:

standard value of 5/-7 = -5/7

similarly,

4/-21=-4/21

now,

(-5/7)+(-4/21)

=-5(3)+(-4)/21. (21 is LCM)

= -15-4/21

= -19/21

sum is -19/21