Add 81/15 and 42/35
1st number: 5 6/15, 2nd number: 1 7/35
81/15 + 42/35 is 33/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
81/15 = 81 × 7/15 × 7 = 567/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
42/35 = 42 × 3/35 × 3 = 126/105 - Add the two like fractions:
567/105 + 126/105 = 567 + 126/105 = 693/105 - 693/105 simplified gives 33/5
- So, 81/15 + 42/35 = 33/5
In mixed form: 63/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15+84/35 81/30+42/35 81/15+42/70 81/45+42/35 81/75+42/35