Which fraction is closest to zero? 8/12, 5/8, 6/10, 2/3

6/10 is the closest to zero because if you simplify all the fractions you can, then convert them into decimals, you can easily find what is closer to zero:

8/12 = 2/3 = 0.66

5/8 = 0.62

6/10 = 3/5 = 0.60

2/3 = 0.66

0.60 or 6/10 is the smaller number; ))