Add 72/15 and 27/42
1st number: 4 12/15, 2nd number: 27/42
72/15 + 27/42 is 381/70.
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,
72/15 = 72 × 14/15 × 14 = 1008/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Add the two like fractions:
1008/210 + 135/210 = 1008 + 135/210 = 1143/210 - 1143/210 simplified gives 381/70
- So, 72/15 + 27/42 = 381/70
In mixed form: 531/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/15+54/42 72/30+27/42 72/15+27/84 72/15+81/42 72/45+27/42 72/75+27/42