Chapter 7 –
Identify Subproblems – Day 1
POD – None
Assigned
Previous Homework
– Pg
Questions -
Transparency??
Be careful
of “units” in this chapter – Note #1 ounces and pounds, #8 hours and minutes
Per Cents
Many of the problems in this chapter
involve percents.
There is a link on the M110 web page
to practice after today’s review
Proportion Method for solving
interest problems
Teacher lead:
10% of 150
is what number?
30 is what
percent of 180?
30% of a
certain number is equal to 28. What is
the number?
IN CLASS PRACTICE
What
Percent of 97 is equal to 36?
1. What is 2.5% of 12?
2. What number is 40% of 64?
3. Of the 8,760 hours in a year, most television
sets are on for 2,190 hours. What
percent is this?
4. The
5. Bill has saved $1,285 toward buying an
outboard motor for his boat. He claims
that this is 80% of his goal. What is
his goal?
Teacher Lead – Mark-up &
Mark-down
Alex
Stowe’s house was reassessed at $126,000, up $6,000 from the last
assessment. What was the percent
increase?
Susan
purchased a dress for 30% discount. The
original price of the dress was $49.99.
What price did Susan pay?
The
bookstore purchased a book and marked it up 40%. The bookstore sold the book for $30.80. What price did the bookstore pay for the
book?
Suppose you
paid $24 for a pair of shoes that were discounted 20%. What was the original price of the shoes?
IN CLASS
1. What is the price of a $65 item, marked up 15%?
2. Phoebe paid $32 for a pair of gold shoes that
were listed for $40. What rate of
discount did she receive?
3. Byron purchased a bicycle at a 10% discount
sale for $121.50. What was the original
price of the bicycle?
4. A shoe store uses a markup rate of 45%. One pair of shoes has a selling price of
$72.50. Find the cost of the shoes.
Chapter 7 – Identify Subproblems
Break the
problem down into the subproblem.
Listing the subproblems helps focus & direct your work.
IN CLASS
Stereo
Williams and Son Department Store was
going out of business. At first they had
all the electronics marked 10% off. Then
they marked everything down an additional 25% from the last posted price. What is the current price of a stereo set
that originally cost $189?
Assignment - POD - An “A” in Math
Daniella wants an “A” in Math. So far, she has 598 out of 700 points
possible. What percentage of the
remaining 350 points must she earn in order to raise her average to exactly
90%?
Chapter 7 –
Read pages 170-177
Homework: #4, #6, #8 – Be careful of units – miles/hr, but question asks for
minutes.
Homework: Page 155 -