Question

By what number should (-5)-¹ be multiplied so that the product is (8)-¹?​

Answer 1

a−m=1am

Let x be the number. Then x×(−8)−1=(10)−1

x×1/−8=1/10

Multiplying by -8 both sides,

x=−8/10=−4∗2/5∗2=−4/5

Hope helps