Add 75/72 and 21/28
1st number: 1 3/72, 2nd number: 21/28
75/72 + 21/28 is 43/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 28 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
75/72 = 75 × 7/72 × 7 = 525/504 - Likewise, for the 2nd fraction, since 28 × 18 = 504,
21/28 = 21 × 18/28 × 18 = 378/504 - Add the two like fractions:
525/504 + 378/504 = 525 + 378/504 = 903/504 - 903/504 simplified gives 43/24
- So, 75/72 + 21/28 = 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: 75/72+42/28 75/72+21/56 75/72+63/28 75/72+21/84