(5 / 8 × 7 / 3 + 2 / 3 × 5 / 8) △ 5 / 8

(5 / 8 × 7 / 3 + 2 / 3 × 5 / 8) △ 5 / 8

(5/8×7/3+2/3×5/8)÷5/8
=5/8×(7/3+2/3)×8/5
=7/3+2/3
=3