Answer:
The answer is 55%.
Step-by-step explanation:
This problem involves subtraction and addition.
First you need to add the percent rollerblading got (14%) to the percent swimming got (31%).
When you're finished you should have 45%.
Now you subtract that from 100%.
Now you should have 55%.
So the answer is that 55% of the class voted for biking.
Further Explanation:
Subtraction is when you find the difference, or how much you have left, when a number of something is taken away from the total.
Addition is when you find the sum, or how much you have in all, when a number is add to your total.
