Add 27/60 and 28/21
1st number: 27/60, 2nd number: 1 7/21
27/60 + 28/21 is 107/60.
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,
27/60 = 27 × 7/60 × 7 = 189/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
28/21 = 28 × 20/21 × 20 = 560/420 - Add the two like fractions:
189/420 + 560/420 = 189 + 560/420 = 749/420 - 749/420 simplified gives 107/60
- So, 27/60 + 28/21 = 107/60
In mixed form: 147/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/60+28/21 27/60+56/21 27/60+28/42 81/60+28/21 27/60+84/21 27/60+28/63