Simplify, 12 divided by 1/4+2/5-2^3

Answer 1

1/4 + 2/5 -2^3 =1/4 + 2/5 -8

1/4 + 2/5 -2^3 =(1*5)/(4*5)+(2*4)/(5*4)-8*20/20=

5/20 + 8/20 - 160/20 =(5+8-160)/20= -147/20

12=(12*20)/20=240/20

12/(1/4+2/5-2^3)=(240/20)/(-147/20)=

(240*20)//-147*20)= -240/147

Answer 2

2/3-5/12+4/9 simplify