Question

what number should be added -11 to get - 15/21​

Answer 1

Let the required number be x.

15/21+x=13/84

x=13/84 -15/21

x=13*21-15*84/84*21

x=273-1260/1764

x=-987/1764

Answer 2

Step-by-step explanation:

Let the number be x which added this number

then,

According to the question

-11+x=-15/21

x=-15/21 +11

x=-15+231/21

x=216/21

x=10.28

so ,10.28 is added to this