1. Warm Up
With a partner, look at these models and try to figure out the missing quantities. 8 12 10 5 5 5 5 5

2. Let’s look at what we did yesterday…
What number is 70% of 20?
Using ONE UNIT
Picture:
Answer:
Using the TOTAL

3. Is there a simpler way we can model these problems?

4. Simplifying Our Model What number is 70% of 20? Using ONE UNIT
Picture:
Answer:
Reasoning:
Using the TOTAL

5. Example 1 – WE DO What number is 30% of 50? Using ONE UNIT Picture:
Answer:
Reasoning:
Using the TOTAL

6. Example 2 – YOU DO What number is 60% of 35? Using ONE UNIT Picture:
Answer:
Reasoning:
Using the TOTAL

7. Example 3 – WE DO What number is 33% of 55? Using ONE UNIT Picture:
Answer:
Reasoning:
Using the TOTAL

8. Example 4 – WE DO – Application
Pheobe saved up all his coins for over a year.  When he wanted to cash them in, he counted them all and had $185.  He went to the CoinStar machine and realized they charge a 9.8% fee to use the machine. A) About how much is the fee to use the machine? B) About how much money will Pheobe get?

9. Key Information: Money put into the machine: $185 Fee: 9.8%
Example 4 – Finding the Fee
Key Information: Money put into the machine: $185 Fee: 9.8%
Using ONE UNIT
Picture:
Answer:
Reasoning:
Using the TOTAL

10. Key Information: Money put into the machine: $185 Fee: 9.8%
Example 4 – Finding how much Pheobe gets
Key Information: Money put into the machine: $185 Fee: 9.8%
Using ONE UNIT
Picture:
Answer:
Reasoning:
Using the TOTAL