(1-1/4-1/4+1/16+1/16):(1-1/4-1/4)
=(3/4-1/4+1/8):(3/4-1/4)
=(1/2+1/8):(1/2)
=(5/8):(1/2)
=5/4
原来甲仓的粮食是乙仓的四分之五