A class voted for either kayaking, fishing, or hiking as their favorite summer activity. if hiking got 17% percent of the vote and fishing got 33%, what percentage of the class voted kayaking?

In a problem such as this one, the percentages have to add up to 100%.

Thus, if you have 17% and 33% already, and add them together, you get 50%. Subtracting 50% from 100%, you obtain 50%. So: 50% of the class voted kayaking.

50%

100-17-33

Just the difference after subtraction