Chapter 7: Applying Percents
percent equation
percent of change
percent proportion
7-1: Percent of a Number
7-2: The Percent Proportion
percent proportion
In a percent proportion, one ratio or fraction compares part of a quantity
to the whole quantity, also called the base.
What percent of 6 is 3?
What number is 50% of 6?
3 is 50% of what number?
7-3: Percent and Estimation
7-4: Algebra: The Percent Equation
percent equation
part = percent · whole
7-5: Problem-Solving Investigation
Mid-Chapter Quiz
7-6: Percent of Change
percent of change
percent of increase
percent of decrease
A percent of change is a ratio that compares the change in quantity to the original amount.
7-6: Sales Tax and Discount
sales tax
discount
7-7: Simple Interest
simple interest
principal
Simple interest is the amount paid or earned for the use of money.
I = p r t;
p Principal is the amount of money deposited or borrowed.
r Annual interest rate written as a decimal.
t amount of time, expressed in years, that money is deposited or borrowed
Study Guide and Review
discount
percent equation
percent of change
percent of decrease
percent of increase
percent proportion
principal
sales tax
simple interest