1. The problem is to convert 20 days into hours and express the result as a ratio. 2. We know the conversion factor: 1 day = 24 hours. 3. To convert 20 days to hours, multiply 20 by 24: $$20 \times 24 = 480$$ 4. So, 20 days equals 480 hours. 5. If the ratio is days to hours, it is: $$20 : 480$$ 6. Simplify the ratio by dividing both terms by 20: $$\frac{20}{20} : \frac{480}{20} = 1 : 24$$ 7. Therefore, the ratio of days to hours is $1 : 24$.