This document provides examples for calculating percentages of 25%, 50%, and 75%. It explains that to calculate: - 25%, take half again of the total (1/4) - 50%, take half of the total (1/2) - 75%, add the amounts for 25% and 50% (1/4 + 1/2 = 3/4) It then provides multiple examples showing calculations for 25%, 50%, and 75% of different totals.

1. 25%, 50%, and 75%
Take half to get 50%,
Take half again to get 25% (1/4),
Add them to get 75% (3/4).
By Jim Olsen, W.I.U.
#P3

3. Examples:
1. The fundraiser goal is $4,000. $1,000 has been raised.
What percent has been raised?
1000 1
25%
4000 4
2. Julie made 24 cookies and sold 12 cookies. What
percent were sold?
12 1
50%
24 2
3. The stadium capacity is 8,000. There are 6,000 people
in the stadium. The attendance is what percent of the
capacity? 6000 3
75%
8000 4

4. Examples:
1. 25% of the students polled were in favor of installing a
veggie vending machine. 20 students were polled.
How many favored a veggie machine?
1
25% of 20 = of 20 20 4 5 students
4
2. 50% of the budget is for gas. The budget is $60. How
much is budgeted for gas?
50% of $60 half of $60 $30
3. The fundraiser goal is $400. 75% of the goal has been
raised. How much has been raised?
5 0 % of 4 0 0 = h alf of 4 0 0 $200
2 5 % of 4 0 0 = h alf of 2 0 0 $100
7 5 % of 4 0 0 = 2 0 0 100 $300

5. Examples:
1. 25% of the students polled had their own car. 180
students were polled. How many had their own car?
1 1 1
25% of 180 = of of 180 of 90 45 students
2 2 2
2. 25% of the 18 cups of chocolate chips were used in
the first batch. How many cups of chocolate chips
were used in the first batch?
1 1 1
25% of 18 = of of 18 of 9 4.5 cups
2 2 2
3. 25% of the 18,000 people living in Macon County
voted for Stevenson. How many people in Macon
County voted for Stevenson?
1 1 1
25% of 18000 = of of 18000 of 9000 4500 people
2 2 2

6. • Note on the last three examples that the
(non-zero) numbers were the same
• 18 ÷ 4 = 4.5
• The answers were similar. Just the
decimal place and number of zeros
changed.
• 45, 4.5, 4500.

7. Closing Notes
 Remember 
Take half to get 50% (1/2),
Take half again to get 25% (1/4),
Add them to get 75% (3/4).