Add 15/21 and 6/35
15/21 + 6/35 is 31/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
15/21 = 15 × 5/21 × 5 = 75/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
6/35 = 6 × 3/35 × 3 = 18/105 - Add the two like fractions:
75/105 + 18/105 = 75 + 18/105 = 93/105 - 93/105 simplified gives 31/35
- So, 15/21 + 6/35 = 31/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+6/35 15/21+12/35 15/42+6/35 15/21+6/70 45/21+6/35 15/21+18/35 15/63+6/35 75/21+6/35 15/21+30/35 15/21+42/35