Add 28/60 and 36/21
1st number: 28/60, 2nd number: 1 15/21
28/60 + 36/21 is 229/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
28/60 = 28 × 7/60 × 7 = 196/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
36/21 = 36 × 20/21 × 20 = 720/420 - Add the two like fractions:
196/420 + 720/420 = 196 + 720/420 = 916/420 - 916/420 simplified gives 229/105
- So, 28/60 + 36/21 = 229/105
In mixed form: 219/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/60+36/21 28/60+72/21 28/60+36/42 84/60+36/21 28/60+36/63