Add 9/15 and 27/42
9/15 + 27/42 is 87/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
9/15 = 9 × 14/15 × 14 = 126/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Add the two like fractions:
126/210 + 135/210 = 126 + 135/210 = 261/210 - 261/210 simplified gives 87/70
- So, 9/15 + 27/42 = 87/70
In mixed form: 117/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+27/42 9/15+54/42 9/30+27/42 9/15+27/84 27/15+27/42 9/15+81/42 9/45+27/42 45/15+27/42 9/75+27/42 63/15+27/42