Add 24/21 and 12/15
1st number: 1 3/21, 2nd number: 12/15
24/21 + 12/15 is 68/35.
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,
24/21 = 24 × 5/21 × 5 = 120/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
12/15 = 12 × 7/15 × 7 = 84/105 - Add the two like fractions:
120/105 + 84/105 = 120 + 84/105 = 204/105 - 204/105 simplified gives 68/35
- So, 24/21 + 12/15 = 68/35
In mixed form: 133/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+12/15 24/21+24/15 24/42+12/15 24/21+12/30 72/21+12/15 24/21+36/15 24/63+12/15 24/21+12/45 24/21+60/15 24/21+12/75 24/21+84/15