Add 21/14 and 21/72
1st number: 1 7/14, 2nd number: 21/72
21/14 + 21/72 is 43/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 14 × 36 = 504,
21/14 = 21 × 36/14 × 36 = 756/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Add the two like fractions:
756/504 + 147/504 = 756 + 147/504 = 903/504 - 903/504 simplified gives 43/24
- So, 21/14 + 21/72 = 43/24
In mixed form: 119/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+21/72 21/14+42/72 21/28+21/72 63/14+21/72 21/14+63/72 21/42+21/72 21/70+21/72 21/98+21/72