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33⅓% is 1/3

To find 33⅓% of a number divide by 3.
(Sometimes we round 33⅓% to 33%.)

33⅓ ¢
33⅓ ¢
+ 33⅓ ¢
$1.00

0% 33⅓% 66⅔% 100% 133⅓%

1 2 4
3 3 3 3
3

Find the percent

1. 10 makes out of 30 attempts:
10 1
33⅓%
30 3

2. 40 yes votes on 60 ballots:
40 2
66⅔%
60 3

Recall the strategy:
To find A% of B
You can change the percent to a fraction,
Find B divided by the bottom, then
Multiply by the top.

Find 66⅔% of 18

2
2 18
66 % of 18
3 18 2 6 2 12
3 3

Find the number

1. Find 33⅓% of 24. 1
of 24 24 3 8
3

2. Find 66⅔% of 27.
2
of 27 (27 3) * 2 9 * 2 18
3

3. Find 133⅓% of 150.
4
of 150 (150 3) * 4 50* 4 200
3

Examples:
1. If the bill is $39 and the tip is $13, 13 1
what percent was the tip? 33 1 %
3
39 3
2. If sales are expected to be $240 and the actual sales
were $320, what percent of 240 is 320?
320 32 4
133 1 %
3
240 24 3
3. Total income is 6 million dollars. Taxes and fees are
33%. How much goes to taxes and fees?
2 million dollars
4. We have 30 copies of the book and 67% have been
checked out. How many have been checked out?
two-thirds of 30 is 20

Closing Notes
 Remember 

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33 Percent is One-Third

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