Question

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

Answer 1

You should multiply $\frac{9}{5}$ with $\frac{-5}{9}$ 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,

$a \times \frac{9}{5} = -1$

Solve the above equation for "a"

$a \times \frac{9}{5} = -1\\\\a = -1 \times \frac{5}{9}\\\\a = \frac{-5}{9}$

Therefore, you should multiply $\frac{9}{5}$ with $\frac{-5}{9}$ to get a product of -1