Answer:
13
Step-by-step explanation:
Last month there were 56 vehicles sold - 14 + 42 = 56.
The percentage of minivans is 25% - 14/56 = 0.25
This means 25% of any given amount of vehicles should be minivans.
Out of 52 vehicles, 13 should be minivans - 13/52 = 0.25