The ratio of 2 hours to 160 minutes is _____.

We know that 1 hour = 60 minute

Therefore, 2 hours = 2 × 60 = 120 minutes

So, the ratio of 2 hours to 160 minutes

$=\frac{2 \mathrm{hours}}{160 \mathrm{minutes}}=\frac{120 \mathrm{minutes}}{160 \mathrm{minutes}}=\frac{3}{4}=3:4$