Add 72/15 and 56/84
1st number: 4 12/15, 2nd number: 56/84
72/15 + 56/84 is 82/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
72/15 = 72 × 28/15 × 28 = 2016/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
56/84 = 56 × 5/84 × 5 = 280/420 - Add the two like fractions:
2016/420 + 280/420 = 2016 + 280/420 = 2296/420 - 2296/420 simplified gives 82/15
- So, 72/15 + 56/84 = 82/15
In mixed form: 57/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+56/84 72/45+56/84 72/75+56/84