At a toy factory, a machine is used 3/20 of the time to make trains and 9/20 of the time to make boats. How much less of the total time is the machine used to make trains than to make boats? Simplify the answer if possible. 7/10, 2/5,3/10 or 3/5
The machine is used 3/20 of the time to make trains and 9/20 of the time to make boats. The difference in usage time is 9/20 - 3/20 = 6/20.
Simplifying the fraction, we get 6/20 = 3/10.
Therefore, the machine is used 3/10 less of the total time to make trains than to make boats. The answer is 3/10.