Fraction, Decimal, Percent

1. fraction
decimal
percent

2. #
A fraction -
examples: 1
4
3
4
5
2
4 1 4 3 2 5
It is the express division of two numbers

3. #
A decimal – is another way of writing a
fraction whose denominator is a power of 10
examples:
5
10
75
100
1
.5 .75 1.5
5
10

4. #
percent -
examples: 50
100
75
100
=
=
50%
75%
is a Latin word whose meaning is per
centum or per hundred. The symbol is %.

5. #
conversion

6. #
1.Change percent to fraction:
50
100
75
100
=
=
50%
75%
1
2
=
3
4
=
5
100
=
5% 1
20
=
Remove the percent sign. The denominator
is always be 100, then reduce to lowest terms.

7. #
Change fraction to percent:
50
100
75
100
=
=
50%
75%
1
2
=
3
4
=
5
100
= 5%
1
20
=
1 x 50
2 x 50
3 x 25
4 x 25
1 x 5
20 x 5
=
=
=

8. #
2.Change decimal to percent:
=
=
.57
.75
=
=
=
.82 =
57
75
82
.57 x 100
.75 x 100
.82 x 100
%
%
%
Multiply by 100, then affix the % sign to the
resulting product. Or
Move the decimal point two places to the right, the affix the % sign.

9. #
Change percent to decimal
=
=
45%
75%
=
=
=
3% =
.45
.75
45.
75.
3. .03

10. #
3. Change fraction to decimal:
1
2
3
4
5
8
1 ÷ 2 =
=
=
3 ÷ 4
5 ÷ 8
.5
.75
.625

11. #
Change decimal to fraction:
1
2
3
4
5
8
=
=
=
.5
.75
.625
5
10
75
100
625
1000

12. #
Types of percent
problems

13. #
To get a percent a number,
remember that
OF means multiply (x)
IS means is equal to (=)

14. #
Example 1:
25% of 80 is what number?
=
.25 n
x 80
20 = n
The number

15. #
Example 2:
What is 40 % of 120 ?
= .40
n x 120
48
=
n
The number

16. #
Example 3:
24 is 15 % of what number ?
= .15
24 x n
160
= n
The number
24 ÷ .15

17. #
Example 4:
40% of what number is 28?
=
.40 28
x n
70
=
n
The number
28 ÷ .40
n =

18. #
Example 5:
18 is what percent of 150?
=
18 150
x
P
= P
The percent
of 150
18 ÷ 150
P
=
.12
P = 12%

19. #
Example 6:
What percent of150 is 20?
=
p 150
x 20
=
p 20 ÷ 150
p = .13333
p = 13.33%

20. #
Example problem:
General Santos Hospital has a 35
hours training course for volunteer
workers. Students on the course spend
21 hours on patient care. What percent
of the course is spent on patient care?
What percent of 35 is 21?
=
p 35
x 21
=
p 21 ÷ 35
p = .60 or 60%

21. #
THANK
YOU
!!!