Update your skills. See page 12.
Subtract Fractions
7-5
The chart shows the fractional part of family
income spent on food for five countries.
How much greater is the fractional part for
China than for the U.S.A.?
To find how much greater, p, subtract:
^12 110 p.
First estimate:
1
2 1
1
0
1
2 ^0
1
2 .
Then subtract.
To subtract fractions:
Find the LCD of the fractions.
Rename each fraction as an
equivalent fraction with the
LCD as the denominator.
Subtract. Express the
difference in simplest form.
The fractional part of China’s family income spent
on food is greater than that of the U.S.A.’s.
2
5
Estimate and then subtract. Write each answer in simplest form.
- ^34 2. ^56 3. 170 4. .^15 5. .^12
^58 ^12 .^15 215 130
- ^34 7. ^78 8. ^12 9. ^67 10. .^38
^23 ^56 ^25 ^12 1
1
0
^12
110
110 1 .1 0 .
5
10
1 5
2 5
p^25
Family Income Spent
on Food
India
China
1
2
Mexico
Japan
U.S.A. 110
1
6
4
15
2
5
Think
LCD of
2 and 10
is 10.
simplest form
101
104 ^25
Think
^2
5
is close to
the estimate of
1
2 .
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