Transcript Percents, Decimals, and Fractions

Percents, Decimals,
and Fractions
1
2
21
1 ÷
2
These all mean the same thing.
To change a fraction into a decimal…
Divide the numerator (top number)
by the denominator (bottom number)
1
2
21
To change a fraction into a decimal…
Add a decimal
and zero
1
2
2 1 .0
To change a fraction into a decimal…
Move the decimal
straight up
1
2
.
2 1 .0
To change a fraction into a decimal…
Now just divide
1
2
.
2 1 .0
To change a fraction into a decimal…
And the answer is…
1
= 0.5
2
To change a decimal into a fraction…
(You have to know place value!)
Change 0.8 to a fraction in lowest terms
Read it: 0.8 (eight tenths)
8
Write it: 10
4
Reduce it: 5
To change a decimal into a fraction…
(You have to know place value!)
Change 0.09 to a fraction in lowest terms
Read it: 0.09 (nine hundredths)
Write it:
Reduce
9
100
9
it: 100
(already in lowest terms)
To change a decimal into a percent…
Change 0.09 to a percent
Multiply by 100 and add a % sign
9%
To change a decimal into a percent…
Change 0.09 to a percent
HINT!
0.09
HINT!
The easiest way to multiply by
100 is to move the decimal 2
places to the right.
Answer: 9%
To change a decimal into a percent…
0.45
Change 0.45 to a percent
HINT!
HINT!
Answer: 45%
Fraction Decimal
1
2
=
0.5
=
Percent
50%
Fraction Decimal
1
=
0.25 =
4
Percent
25%
Fraction Decimal
3
=
0.75 =
4
Percent
75%
Fraction Decimal
3
10
=
0.3
=
Percent
30%
Fraction Decimal
3 =
0.03 =
100
Percent
3%