1.turn 8 1/2 back to its original form which is 17/2
2. multiply by 5 because 2 times 5 is 10 which is the number we need the make the denominators even and because we multiplied by 5 on the bottom we multipliy by 5 on the top to make it even which is 85/10
3. put 1 7/10 back to its original form which is 17/10, and because 85 divided by 17 is 5 your answer would be 5 days