26
Multiplying and Dividing Fractions
To multiply fractions, multiply all of the numerators. Also, multiply all of the denominators. Finally,
simplify the fraction.
To divide fractions, invert the fraction that is the divisor. Then, multiply the two fractions. Finally,
simplify the fraction.
Skills Workshop 10
See It
Find the product of these fractions:
2
5
,
3
8
, and
9
10
.
Solution
Step 1: Multiply the numerators (2 × 3 × 9 = 54).
Step 2: Multiply the denominators (5 × 8 × 10 = 400).
Step 3: Simplify the fraction (
54
400
=
27
200
).
Check It
1.
2
3
×
4
5
×
6
7
=
2.
41
54
×
67
100
=
3.
21
36
×
78
90
×
1
5
=
4.
2
7
×
4
9
×
5
8
=
5.
14
19
÷
3
8
=
6.
2
7
÷
8
21
=
7.
41
54
÷
99
100
=
8.
31
32
÷
67
72
=