1full tank - 1/2 tank 0- 1/3 tank leaves what?

To subtract fractions, all we need is a common denominator.

1×1=1                          2×1=2                               3×1=3
1×2=2                          2×2=4                               3×2=6
1×3=3                          2×3=6
1×4=4
1×5=5
1×6=6

the least common denominator is 6

= 1




=

of the tank is left

A. is the answer in this question