Lesson 3.1: Analyze Percents of Numbers

Definition:

Percent: A percent is a ratio, a comparison between two numbers, where the first number is compared to 100. A percent can be written as a fraction, a decimal or a percentage.

Ex: 90% = 0.90

15% = 0.15

4% = 0.04

Key Concept:

We can use equivalent rates to find percentages of numbers. We can analyze these percentages with real world context.

​a. 59% of 640

.

.

.

.b. 20% of 3,542

Example: Olivia is a stockbroker. She makes 4% of her
sales in commission. Last week, she sold $7,200 worth of
stocks.

●How much did she make from commission?

●If she were to average the same commission each week, how much would
she make in commission a year (52 weeks)?