Add 35/84 and 21/15
1st number: 35/84, 2nd number: 1 6/15
35/84 + 21/15 is 109/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
35/84 = 35 × 5/84 × 5 = 175/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
21/15 = 21 × 28/15 × 28 = 588/420 - Add the two like fractions:
175/420 + 588/420 = 175 + 588/420 = 763/420 - 763/420 simplified gives 109/60
- So, 35/84 + 21/15 = 109/60
In mixed form: 149/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+21/15 35/84+42/15 35/84+21/30 35/84+63/15 35/84+21/45 35/84+21/75