(-3)÷｛(-2/5)÷（﹣1/4）｝＝ 要算式

Answer 1

(-3)÷｛(-2/5)÷（﹣1/4）｝
=(-3)÷｛(-2/5) x (-4)｝
=(-3)÷(8/5)
=(-3)x(5/8)
= -15/8

Answer 2

=-3÷（2/5×4）
=-3÷8/5
=-15/8