Add 40/21 and 6/15
1st number: 1 19/21, 2nd number: 6/15
40/21 + 6/15 is 242/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
40/21 = 40 × 5/21 × 5 = 200/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
6/15 = 6 × 7/15 × 7 = 42/105 - Add the two like fractions:
200/105 + 42/105 = 200 + 42/105 = 242/105 - So, 40/21 + 6/15 = 242/105
In mixed form: 232/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+6/15 40/21+12/15 40/42+6/15 40/21+6/30 40/21+18/15 40/63+6/15 40/21+6/45 40/21+30/15 40/21+6/75 40/21+42/15