Student will learn how to solve percent problems, where the task is to determine the whole, the part, or the percent. Here's an example of finding the whole:
40% of what number is 80?
Here's an example of finding the part:
What is 4% of 110?
Some finding the part problems can be done mentally. For example:
What is 15% of 300?
It's easy to find 10% of 300. That's just 30. So 5% must be half that, 15. Therefore, 15% of 30 must be 30 + 15 = 45. Finally, here's an example of finding the percent:
What percent of 315 is 126?
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Next, give your students these challenges:
Conclude by leading this investigation:
Ninja Bed Bugs (multiplication)
7.RP.A.3: Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.