Notes 9.1B
Name_________________
Example
Your turn
How do I use a
fraction to find a
percent of a number?
Find 40% of 60.
1. Write the percent and
whole numbers as fractions.
40% of 60
2. Multiply the fractions.
Use dividing out common
factors (slashing) if possible.
3
40 x 60 = 120
100 1
5
5
3. Simplify if needed.
120 = 24
5
Key Vocabulary
percent (%) – a ratio
with a denominator
of 100
Find 20% of 40.
40 x 60
100 1
Remember:
To find 10% of a number, move the
decimal point 1 place left.
10% of 67.5 = 6.75
10% of 150 = 15.0 or 15
To find 1% of a number, move the
decimal point 2 places left.
1% of 67.5 = 0.675
1% of 150 = 1.50