Add 81/18 and 42/14
1st number: 4 9/18, 2nd number: 3 0/14
81/18 + 42/14 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 14 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
81/18 = 81 × 7/18 × 7 = 567/126 - Likewise, for the 2nd fraction, since 14 × 9 = 126,
42/14 = 42 × 9/14 × 9 = 378/126 - Add the two like fractions:
567/126 + 378/126 = 567 + 378/126 = 945/126 - 945/126 simplified gives 15/2
- So, 81/18 + 42/14 = 15/2
In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+84/14 81/36+42/14 81/18+42/28 81/54+42/14 81/90+42/14 81/18+42/70 81/18+42/98