2/5:2/8•6,9-(5,6+4,5)=?

Interpretation: (2/5) ÷ (2/8) × 6,9 − (5,6 + 4,5)

• (2/5) ÷ (2/8) = (2/5) × (8/2) = 8/5 = 1.6
• 1.6 × 6.9 = 11.04
• (5,6 + 4,5) = 10.1
• 11.04 − 10.1 = 0.94

Final answer: 0,94 (or 0.94 in decimal form).