1/9 is about 11%

To find 11% of a number divide by 9.

By Jim Olsen, W.I.U.#P17

111%

9

1

9

5

9

2

9

7

9

6

9

4

9

3

9

0

9

1

3

2

3

0% 11% 22% 33% 44% 55% 100%77%66% 88%

8

9

9

9

Find the percent

1. $5 is what percent of $9?

2. 80 goals in 90 shots is what percent?

80 888%

90 9

555%

9

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

Find 77% of 180

7 18077% of 180 180 7 20 7 140

9 9

Find the number

1. Find 11% of 27.

2. Find 122% of 360.

3. Find 66⅔% of 936. (Hint: Use front end.)

1 of 27 (27 9) 3

9

2122% of 360 100% of 360 + 360 360 80 440

9

2 936 of 936 *2 312*2 624

3 3

Examples:

1. If there are 450 studentsenrolled at Mark Twain Elementary and 50 are absent,what percent are absent?

2. If Jacy makes 40 of her three-point attempts out of 90 attempts, what is her shooting percent?

2. If 22% of the customers pay their gas bill online and there are 2700 customers, how many pay their gas bill online?

2 2700 of 2700 2 300 2 600

9 9

50 5 111%

450 45 9

40 444%

90 9

Closing Notes

Remember

1/9 11%To find 11% of a number divide by

9.

#P17

RecapHere are the percents we know so far.

Fraction Percent1/2 50 %1/3 33⅓ %1/4 25 %1/5 20 %1/6 16⅔ %1/8 12½ % 1/9 11 %