Question

Simplify : ( 4^-1 + 8^-1 ) / ( 4/9)^-1​

Answer 1

(4^-1+8^-1)/(4/9)^-1
=(1/4+1/8)/9/4
=8+4/32*4/9
=12/32*4/9
=4/8*1/3
=1/2*1/3
=1/5
=0.2
Hence solved