Add 72/21 and 14/4
1st number: 3 9/21, 2nd number: 3 2/4
72/21 + 14/4 is 97/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
72/21 = 72 × 4/21 × 4 = 288/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
14/4 = 14 × 21/4 × 21 = 294/84 - Add the two like fractions:
288/84 + 294/84 = 288 + 294/84 = 582/84 - 582/84 simplified gives 97/14
- So, 72/21 + 14/4 = 97/14
In mixed form: 613/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+28/4 72/42+14/4 72/21+14/8 72/21+42/4 72/63+14/4 72/21+14/12 72/21+70/4 72/21+14/20 72/21+98/4 72/21+14/28