Multiplying Fractions
2/3 * 4/5
8/15
1 1/2 * 5
15/2 or 7 1/2
What is the reciprocal of
11/8
8/11
Multiply straight across (multiply numerators and multiply denominators)
3/5 * 7/8
21/40
5/6 * 1 1/3
10/9 or 1 1/9
3/8 -: 2/3
9/16
All fractions are also what type of problem?
Division problem
4 * 7/8
7/2 or 3 1/2
3 1/3 * 1/4
5/6
6 -: 5/8
48/5 or 9 3/5
How do we convert a mixed number into a fraction?
Use the "C" method. Multiply the denominator with the whole number and add the numerator.
5/12 * 9
15/4 or 3 3/4
1 1/3 * 2 1/8
17/6 or 2 5/6
1/2 -: 5/8
4/5
What is the first rule in dividing fractions?
Keep fraction the same.
2/9 * 3/8
1/12
2 2/3 * 5 1/4
14
3/8 -: 7/12
9/14
What fraction do we flip?
the second fraction