IXL | Percent increase or decrease: word problems

A magician is training for an underwater escape trick. Upon first trying, he could hold his breath for 34 seconds. Now, using a different technique, he can hold it for 50% longer. How long can the magician currently hold his breath?

seconds

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Learn with an example

question

Several years ago, the average serving size of beef at restaurants was 4 ounces. Due to changing restaurant trends, the average serving size is now 25% smaller. What is the current average serving size?

ounces

solution

"25% smaller" means you should subtract 25% from the original amount:

100% of original amount

–

25% of original amount

75% of original amount

Write and solve an equation:

final amount

75% of original amount

75% of 4

0.75

The current average is 3 ounces.

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