Percents
1. Vocabulary:
| English word |
Math symbol |
| is |
= |
| of |
• |
| a number |
n |
| what number |
n |
| what percent |
nn |
2. Basic percent problems:
Percent problems involve three
quantities: a percent, a base (usually a beginning quantity or a
quantity used as a base for comparison), and a final amount
(usually the final quantity or the ending quantity). In general, the
percent times the base equals the amount.
Ex. In each problem, identify the percent, the base, and the final
amount.
a. 50% of 40 is 20
The percent is 50%, the base is 40 and the amount is 20.
b. 10% of 80 is 8
c. 15 is 50% of 30
Ex. Identify whether the base, percent, or amount is the unknown
in each of the following basic percent problems.
|