Add 80/28 and 21/60
1st number: 2 24/28, 2nd number: 21/60
80/28 + 21/60 is 449/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
80/28 = 80 × 15/28 × 15 = 1200/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Add the two like fractions:
1200/420 + 147/420 = 1200 + 147/420 = 1347/420 - 1347/420 simplified gives 449/140
- So, 80/28 + 21/60 = 449/140
In mixed form: 329/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+42/60 80/56+21/60 80/28+63/60 80/84+21/60