Transcript Slide 1 - Primary Resources

Converting Fractions 2
we have looked at converting FRACTIONS
to DECIMALS. We can also show fractions
as PERCENTAGES.
PER CENT means OUT OF (per) 100 (cent)
3
4
is 75 % (the symbol for PERCENT)
Converting Fractions 2 - PERCENTAGES
To convert any FRACTION to a PERCENTAGE, first
convert it to a DECIMAL.
3
10
is 0 . 3 as a decimal
Converting Fractions 2 - PERCENTAGES
With any decimal, it doesn’t matter how many zeroes we
add to the numbers after the decimal point, as long as
we write them after all the other numbers.
0.3 =
0.30
=
0.300
=
0.3000
and so on
Converting Fractions 2 - PERCENTAGES
For percent we only need 2 digits after the DECIMAL
POINT.
0.3 =
0.30
multiply the number by 100 to get it to percentages
Remember: to x 100 we move the digits 2 places to
the left.
0 . 3 0 x 100 = 30
Converting Fractions 2 - PERCENTAGES
0.3 =
0.30
= 30 %
Converting Fractions 2 - PERCENTAGES
0.73
= 73 %
0.89
= 89 %
if there are more than 2 numbers after the DECIMAL
POINT, we use the same rules.
0.7162
= 71 . 62 %
Converting Fractions 2 - PERCENTAGES
Common decimals and percentages:
1
0.1
10 %
0.2
20 %
0.5
50 %
0.9
90 %
0 . 25
25 %
10
1
5
1
2
9
10
1
4
Converting Fractions 2 - PERCENTAGES
.
.
Common decimals and percentages:
1
0.3
3
.
2
3
0.6
33 . 3 %
.
66 . 6 %