(1/4 - 1/8)÷ 5/12 - 5/12= 1/8 ÷ 5/12 - 5/12= 3/10 - 5/12= - 7/60
(1/4-1/8)/(5/12)-5/12=(1/8)/(5/12)-5/12=-7/60
60分之7
