Your friend estimated that it would take 5 hours to finish an art project. It actually took 16 hours to finish the project. The amount of time it took to finish the project was % of the estimated time.

31.25%

Step-by-step explanation:

Divide 5 by 16 to get the answer of 31.25% in which it took to finish an art project.

edit: this is wrong so please ignore this :P

320%

Step-by-step explanation:

It took 16 hours to finish what their friend thought would take 5 hours. 16 hours was the actual time, and 5 hours was the estimated time.

16 / 5 = 3.2

3.2 x 100 = 320%

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068