Question

The product of two rational numbers is –7. If one of the number is –5, find the other?

Answer 1

Let the other number be x 
one of the number = -5 
their product = -7 
⇒-5×x =-7
⇒x = -7/-5
⇒x = 7/5 .

Answer 2

given the product of two rational numbers = -7
                         one of the number = -5
other number be 'x'.
                   So,x= -7/-5
                          =7/5