Add 15/9 and 81/42
1st number: 1 6/9, 2nd number: 1 39/42
15/9 + 81/42 is 151/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
15/9 = 15 × 14/9 × 14 = 210/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
81/42 = 81 × 3/42 × 3 = 243/126 - Add the two like fractions:
210/126 + 243/126 = 210 + 243/126 = 453/126 - 453/126 simplified gives 151/42
- So, 15/9 + 81/42 = 151/42
In mixed form: 325/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9+81/42 15/18+81/42 15/9+81/84 45/9+81/42 15/27+81/42 75/9+81/42 15/45+81/42 15/63+81/42