Add 72/21 and 63/14
1st number: 3 9/21, 2nd number: 4 7/14
72/21 + 63/14 is 111/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
72/21 = 72 × 2/21 × 2 = 144/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
63/14 = 63 × 3/14 × 3 = 189/42 - Add the two like fractions:
144/42 + 189/42 = 144 + 189/42 = 333/42 - 333/42 simplified gives 111/14
- So, 72/21 + 63/14 = 111/14
In mixed form: 713/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+63/14 72/21+63/28 72/63+63/14 72/21+63/42 72/21+63/70 72/21+63/98