This is what we did in class today. ( sorry for bad quality)
19% of 65
26% of 135
Page 138 (1)
Last year the fundraising team ran a school store and made 50 1/2%
profit. The school store usually has total sales of about $10 000 per year.
1. a) How much is 50% profit?
b) How much is 1% profit?
c) How much is 1/2% profit?
d) How much is 50 1/2% profit?
Page 138 (2)
2. The committee wants to donate 10% of the store profits for
a) What is 10% of the profit calculated in #1d)?
b) How could you determine 10% of a number mentally? Explain.
Page 139 (3)
3. The committee knows that access to clean drinking water is critical
in preventing serious illness. They would like to donate 20% of their
profits for providing clean drinking water. How could you determine
20% of the profits mentally using your answer to #2?
Page 139 (4)
4. Oral rehydration therapy (ORT) is a simple yet inexpensive
medicine designed to fight dehydration.
a) If it costs $0.10 to prepare 1 L of ORT solution, how many
litres of ORT can be prepared using the money from the 1/2% portion of the store profits?
b) If the average adult needs about 4 L of ORT for adequate rehydration, how many adults can be treated using the 1/2% profit?
Different way of finding percents of a number.
Show You Know ( page 140 )
Here's a video that may help you.