Add 15/42 and 98/81
1st number: 15/42, 2nd number: 1 17/81
15/42 + 98/81 is 1777/1134.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
15/42 = 15 × 27/42 × 27 = 405/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
98/81 = 98 × 14/81 × 14 = 1372/1134 - Add the two like fractions:
405/1134 + 1372/1134 = 405 + 1372/1134 = 1777/1134 - So, 15/42 + 98/81 = 1777/1134
In mixed form: 1643/1134
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+98/81 15/84+98/81 45/42+98/81 75/42+98/81