Question

五分之四除以八分之五减五分之一除以八分之五简算

Answer 1

(4/5)÷(5/8)-(1/5)÷(5/8)
=(4/5)x(8/5)-(1/5)x(8/5)
=(8/5)x(4/5-1/5)
=(8/5)x(3/5)
=24/25