Answer:
The first two days he will both swim and bike are days 24 and 56.
Step-by-step explanation:
Swim: Days 6,12,18,24,30,36,42,50,56
Bicycle: Days 8,16,24,32,40,48,56,
1. 1:4
2. 4:1
3. 3:5
4. 2:3
5. 1:3
6. 1:10
7. 1:2
8. 3:2
0
0 divided by anything is always 0, so you don't have to round.
1. 0.21 like that has happened