Answer:
Convert 7/20 and 1/3 into percents.
Multiply 7/20 by 5:
35/100 = 35%
1/3 will be equal to 33.3% if multiplied by 33.3
*33 is rounded by the tenths place.
Nothing to change with 34%, since it's already a percentage.
Let's compare:
33.3% < 34% < 35%
Therefore Sid finished the most levels on a computer game.