Add 72/21 and 49/60
1st number: 3 9/21, 2nd number: 49/60
72/21 + 49/60 is 1783/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
72/21 = 72 × 20/21 × 20 = 1440/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
49/60 = 49 × 7/60 × 7 = 343/420 - Add the two like fractions:
1440/420 + 343/420 = 1440 + 343/420 = 1783/420 - So, 72/21 + 49/60 = 1783/420
In mixed form: 4103/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+98/60 72/42+49/60 72/63+49/60