Order the steps to solve a time-and-work problem (A finishes in 12d, B in 8d)

Exercise and reference answers

Steps

1. Compute A's 1-day work: 1/12
2. Compute B's 1-day work: 1/8
3. Add: combined 1-day work = 1/12 + 1/8 = 5/24
4. Take reciprocal: combined time = 24/5 days
5. Convert: 4 days and 4/5 of a day (≈ 4 days 19 hours)