4 × (2/8 – 1/5) = pakek cara jgn lupa!

4 x (2/8 – 1/5)
dahulukan yg di dalam kurung
=4 x (10/40 – 8/40)
=4 x 2/40
=4 x 1/20
=4/20
=1/5
semoga membantu