Question

By what number would you multiply 9/5 to get a product of -1

Answer 1

You should multiply
`(9)/(5)` with
`(-5)/(9)` to get a product of -1

Solution:

Let the number to be multiplied be "a"

Given that,

By what number would you multiply 9/5 to get a product of -1

'a" multiplied with 9/5 should give a product -1

Therefore, writing it mathematically we get,

`a * (9)/(5) = -1`

Solve the above equation for "a"

`a * (9)/(5) = -1\\\\a = -1 * (5)/(9)\\\\a = (-5)/(9)`

Therefore, you should multiply
`(9)/(5)` with
`(-5)/(9)` to get a product of -1