Add 2/15 and 81/42
1st number: 2/15, 2nd number: 1 39/42
2/15 + 81/42 is 433/210.
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,
2/15 = 2 × 14/15 × 14 = 28/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
81/42 = 81 × 5/42 × 5 = 405/210 - Add the two like fractions:
28/210 + 405/210 = 28 + 405/210 = 433/210 - So, 2/15 + 81/42 = 433/210
In mixed form: 213/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/15+81/42 2/30+81/42 2/15+81/84 6/15+81/42 2/45+81/42 10/15+81/42 2/75+81/42 14/15+81/42