By what number should (-15) -1 be divided so that the quotient may be equal to (-5) -1 ?

Question

Philoid · Accepted Answer

Let the number (-15)^-1 shlould be devided by

According to the question:

(-15)^-1 ÷= (-5)^-1

[Using ^-n = ]

[Using ]

Therefore (-15)^-1 should be devided by