Add 98/28 and 21/72
1st number: 3 14/28, 2nd number: 21/72
98/28 + 21/72 is 91/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
98/28 = 98 × 18/28 × 18 = 1764/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Add the two like fractions:
1764/504 + 147/504 = 1764 + 147/504 = 1911/504 - 1911/504 simplified gives 91/24
- So, 98/28 + 21/72 = 91/24
In mixed form: 319/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/28+42/72 98/56+21/72 98/28+63/72 98/84+21/72