Fractions with Money
8-10
A package of copier paper costs $1.50.
Leroy bought a package for ^34 of the cost.
How much did Leroy pay?
To determine how much Leroy paid, p,
find:
3
4 of $1.50p.
First estimate:
3
4 of $1.50
3
4 of $1.60
^14 of $1.60$.40, so ^34 of $1.60$1.20.
Then compute.
^34 of $1.50^34 $1.50
^34 of $1.50^34 $1 1 .50
^3
4
of $1.50^3
4
$1
1
.50 $4
4
.50
^3
4
of $1.50^3
4
$1
1
.50 $1.13
p$1.13
Leroy paid $1.13.
Study this example.
Divide: $8.75 1
1
4 d.
$8.75 1 ^14 $8 1 .75^54 $8 1 .75^45
$1.75
$8.75 1 ^14 $8 1 .75^54 $8 1 .75^45 $7 1 .00$7.00
1
d$7.00
$1.125$1.13
4 $ 4 .5 0 0
Round to the
nearest cent.
Rename as fractions.
Multiply by the
reciprocal.
Remember: “of” means “times.”
Think
$1.13 is close to the estimate of $1.20.
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