345:34

Do you mean division, or the ratio?

• Division: 345 ÷ 34 = 10 with remainder 5 → 10 5/34 ≈ 10.1470588235…
• Ratio: 345:34 is already in lowest terms (gcd = 1). As a decimal ratio, ≈ 10.147:1.

If you want something else (like a simplified decimal or a percent), tell me.