product of two rational numbers is -28/15. If first rational number is 4/5, than the other rational number is .
- -7/3
- -5/3
- 3/7
- 9/3
Explanation
let 2nd rational number is =x
first rational number is = 4/5
According to given condition
x*4/5=-28/15
5*4x/5=-28/15*5
1/4*4x=-28/3*1/4
x=-7/3
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