(-1 7/8*1 4/5+9/16)*(-8/9)

(-15/8 × 9/5 + 9/16) × (-8/9) = (-3/8× 9/1 + 9/16) × (-8/9) = (-27/8 + 9/16) × (-8/9) = (-54/16 + 9/16) × (-8/9) = (-45/16) × (-8/9) = 5/2 × 1/1 = 5/2 = 2,5.