11.17 Find original price given tax, tip
November 22, 2014
T.P: to find the original price when given the
taxed/tipped price and percent
HW: See Website
Do Now:
After receiving a 20%discount, Ann paid $34.
What was the original price of the item? What
was the discount?
11.17 Find original price given tax, tip
November 22, 2014
HW:see website
Teaching Point: to find the original price when
given the taxed/tipped price and percent
Do Now: Turn to page 51 in last weeks ELA
packet. Answer Option #1
11.17 Find original price given tax, tip
November 22, 2014
In today's lesson we will be given the
adjusted price (price with tax or tip) and
we will need to find the original price.
When given the price with tax or tip and
the percent, to find the original we must
first find the percent paid (add to 100%).
A proportion or an equation can be
used to find the original price.
adjusted percent
adjusted price
=
original
100
11.17 Find original price given tax, tip
MODEL:A shirt is taxed at 8%. The taxed price is $24.
What was the original price?
What was the amount of tax?
November 22, 2014
11.17 Find original price given tax, tip
TRY IT:
Stephanie took her friends out to dinner and paid $200. This
price includes a 20% tip . Find the original price. Find the
amount of tip she left.
November 22, 2014
11.17 Find original price given tax, tip
November 22, 2014
1 Pre Activity Assessment: Mark bought a video game and paid $43.
This price included the 8% tax. Find the original amount.
A $46.44
B $3.44
C $3.19
D $39.81
11.17 Find original price given tax, tip
November 22, 2014
Activity:
A: 1. Given: Taxed price = $35; tax rate 5%; find the original price
2.
B:
Given: Price with tip= $80; tip rate 15%;find the original price and
the amount of tip.
Critique Chris' work. Is she correct?
Chris paid $120 for a watch that includes 8.25% tax. He said he spent
$9.15 for tax. Was she correct?
C: Given: Price $50 after 8% tax on the original price and 20% tip on
the original price has been applied. Find the original price.
Enrichment: Aiden's mom calculated that in the previous month, their
family had used 40% of their monthly income for gasoline and 63% of
that gasoline was consumed by the family's SUV. If the family's SUV
used $261.45 worth of gasoline last month, how much was left after
gasoline expenses?
11.17 Find original price given tax, tip
Summary:
What did you learn today?
November 22, 2014