Question

hi, friends
Can anyone please solve this question...

Answer 1

2^-1 / 5^-1(-5/8)^-1
= (1/2)/(1/5)(-8/5)(Since , a^-1= 1/a)
= 1(5)/2(-8/5)
= 5/2(-8/5)
= -8/2
= -4