Add 21/60 and 21/15
1st number: 21/60, 2nd number: 1 6/15
21/60 + 21/15 is 7/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
21/15 = 21 × 4/15 × 4 = 84/60 - Add the two like fractions:
21/60 + 84/60 = 21 + 84/60 = 105/60 - 105/60 simplified gives 7/4
- So, 21/60 + 21/15 = 7/4
In mixed form: 13/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+21/15 21/60+42/15 21/60+21/30 63/60+21/15 21/60+63/15 21/60+21/45 21/60+21/75