Add 20/28 and 49/60
20/28 + 49/60 is 643/420.
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,
20/28 = 20 × 15/28 × 15 = 300/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
49/60 = 49 × 7/60 × 7 = 343/420 - Add the two like fractions:
300/420 + 343/420 = 300 + 343/420 = 643/420 - So, 20/28 + 49/60 = 643/420
In mixed form: 1223/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+49/60 20/28+98/60 20/56+49/60 60/28+49/60 20/84+49/60