1. Algebra
Percent Problems

2. Review Write as a fraction in simplest form. 74% = = 74/100 = 37/50
2.6% =
= 2.6/100
= 26/1000
= 13/500

3. 15% of 180 is what number?
There is a great formula that can help us solve all of these percent questions.
part = %
whole
The next formula states the same relationship.
is = % of

4. 15% of 180 is what number?
is = % Set up the proportion. of
x = Simplify if possible(only up and down).
x = Cross multiply. Different than cross cancel.
I cans how you a shortcut here!
20x = Solve.
x = % of 180 is 27!

5. What percent of 225 is 99?
is = % Set up the proportion. of
99 = x Simplify if possible(only up and down).
11 = x Cross multiply. Different than cross cancel.
25x = Solve.
x = % of 225 is 99!

6. See if you can do it! 30 is what percent of 75?
Answer: 30 is 40% of 75.
4.8% of 125 is what number?
Answer: 48% of 125 is 6.

7. If the original price of an item is $54 and it is discounted 20%, what is the sale price?
part = % In order to find the sale price, we must find
whole the discount, which is the part.
x = Simplify if possible(only up and down).
x = Cross multiply. Different than cross cancel.
5x = Solve.
x = The discount, x, is $10.80!
The sale price is $ $10.80 = $43.20

8. x = 3 Cross multiply. Different than cross cancel. 480 20
Ron makes 15% commission on each pair of shoes he sells. How much commission does he make if he sold $480 worth of shoes?
part = % In order to commission, we must find
whole the part.
x = Simplify if possible(only up and down).
x = Cross multiply. Different than cross cancel.
20x = Solve.
x = 72 Ron made $72.

9. HW
#1-16, #25-36