1. Proportions and Percent Equations
Algebra 4-3

2. Percent
Percent is a ratio that compares an number to 100
23% =

3. Solve Percent Problem
Can solve a percent problem by writing and solving a proportion
Percent 𝑛 100 = 𝑝𝑎𝑟𝑡 𝑤ℎ𝑜𝑙𝑒

4. Percents and Proportions
Find % Find Part Find Whole What % of 45 is 10? What is 16% of 261? 71% of what # is 78? 𝑛 100 = 𝑝𝑎𝑟𝑡 𝑤ℎ𝑜𝑙𝑒 = 𝑤 261 𝑝𝑎𝑟𝑡 𝑤ℎ𝑜𝑙𝑒 = 87 𝑣 𝑝𝑎𝑟𝑡 𝑤ℎ𝑜𝑙𝑒

5. As an equation “is” means = Write percents as a decimal
“% of” means multiply
“is” means =
Write percents as a decimal

6. Percents and Fractional Equivalents (You should know)