(2.56-1.4):3

Interpret as (2.56 − 1.4) ÷ 3.

• 2.56 − 1.4 = 1.16
• 1.16 ÷ 3 = 0.386666… = 29/75

So the value is 29/75 ≈ 0.387 (to three decimals).