1. Percent of a Number

2. Copyright © 2000 by Monica Yuskaitis
Definition
Percent can be defined as “of
one hundred.” of
100
Copyright © 2000 by Monica Yuskaitis

3. 20 % Means 20 parts out of 100 or 20 hundredths. 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
Copyright © 2000 by Monica Yuskaitis

4. Percents Have Equivalents in Decimals and Fractions
Simplified
Percent
Decimal
Fraction
20%
.20 20
100 1 5 = = =
Copyright © 2000 by Monica Yuskaitis

5. How to Find the Percent of a Whole Number
The first thing to remember is “of” means multiply in mathematics. of x =
Copyright © 2000 by Monica Yuskaitis

6. How to Find the Percent of a Whole Number
Step 1 - When you see a percent problem you know when you read “of” in the problem you multiply. x
25% of 200
Copyright © 2000 by Monica Yuskaitis

7. How to Find the Percent of a Whole Number
Step 2 – Change your percent to a decimal and then move it two places to the left. . .
25% x 200
Copyright © 2000 by Monica Yuskaitis

8. How to Find the Percent of a Whole Number
Step 3 – Multiply just like a regular decimal multiplication problem.
200
x . 25
1000
+400
5000
Copyright © 2000 by Monica Yuskaitis

9. How to Find the Percent of a Whole Number
Step 4 – Place the decimal point 2 places to the left in your answer.
200
x . 25
1000
+400 .
5000
Copyright © 2000 by Monica Yuskaitis

10. What is the percent of this number?.
20 % of 820 . x
820
x . 20
000
+1640 .
16400
Copyright © 2000 by Monica Yuskaitis

11. What is the percent of this number?. x
40 % of 725 . 1 2
725
x . 40
000
+2900 .
29000
Copyright © 2000 by Monica Yuskaitis

12. What is the percent of this number?. x
60 % of 692 . 5 1
692
x . 60
000
+4152 .
21520
Copyright © 2000 by Monica Yuskaitis