Add 15/28 and 84/72
1st number: 15/28, 2nd number: 1 12/72
15/28 + 84/72 is 143/84.
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,
15/28 = 15 × 18/28 × 18 = 270/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
84/72 = 84 × 7/72 × 7 = 588/504 - Add the two like fractions:
270/504 + 588/504 = 270 + 588/504 = 858/504 - 858/504 simplified gives 143/84
- So, 15/28 + 84/72 = 143/84
In mixed form: 159/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+84/72 15/56+84/72 45/28+84/72 15/84+84/72 75/28+84/72