Question

by what no should (1/2)-1 be multiplied so that the product is (-5/4)-1

Answer 1

1/2-1
=-1/2

(-5/4)-1
=-5-4/4
-9/4

let the number to be multiplied be x

therefore
(-1/2)*x=-9/4
-x/2=-9/4
-4x=-18
x=18/4
x=9/2

hope it helps you