Question

the product of two rational number is -21/40 if one of the number is 7/5 than find the other


send please step by step explain ​

Answer 1

The product =-21/40

One number=7/5

The other number=X

X×7/5=-21/40

X=-21/40×(The reciprocal of 7/5, as the number reached this side through transposition)

X=-21/40×5/7

X=-105/280

X=-21/56

So the other number is -21/56