This document outlines lessons, examples, and homework problems for a 7th grade math class on finding percentages. It includes examples of using the tape diagram and factors of 100 methods to solve percentage word problems and determine unknown whole amounts when given a percentage. Students are provided multi-step word problems to solve using the percentage equation of part is to percent as whole.

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Complete Exit Ticket # 4
Module 4 - Lesson 5 12/9/15
Hw: Lesson 5 Problem set
#'s 1 - 7 Use percent
Equation
DO NOW
Finding 100%
when given
another percent

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New = (Percent)(old)

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The 42 students who play wind instruments represent
75% of the students who are in band. How many students
are in band?
part = percent whole
Example 1 S.28

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1.) Bob's Tire Outlet sold a record number of tires last month.
One sold 165 tires, which was 60% of the tires sold in the
month. What was the record number of tires sold?
part = percent whole
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2.) Nick currently has 7,200 points in his fantasy baseball
league, which is 20% more points than Adam. How many points
does Adam have?
part = percent whole
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3.) Kurt has driven 276 miles of his road trip but has 70%
of the trip left to go. How many more miles does Kurt have
to drive to his destination?
part = percent whole
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4.) Derrick had a 0.250 batting average at the end of his
last baseball season. Which means he got a hit 25% of the
times he was at bat. If Derrick had 47 hits last season, how
many times did he bat?
part = percent whole
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5.) Nelson used 35% of his savings account for his class trip
in May. If he used $140 from his savings account while on his
class trip, how much money was in his savings account before
the trip?
part = percent whole
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Problem Set #11 and 18 S.33

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Answer each part below using only mental math and describe your method.
a. If 39 is 1% of a number, what is that number? How did you find your answer?
b. If 39 is 10% of a number, what is that number? How did you find your answer?
c. If 39 is 5% of a number, what is that number? How did you find your answer?
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Answer each part below using only mental math and describe your method.
d. If 39 is 15% of a number, what is that number? How did you find your answer?
e. If 39 is 25% of a number, what is that number? How did you find your answer?
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Closing:
1.) What did the tape diagram method and the factors of 100
method have in common?
2.) Can you describe a situation where you would prefer using
the tape diagram?
3.) Can you describe a situation where you prefer using the
factors of 100?