Add 80/15 and 63/28
1st number: 5 5/15, 2nd number: 2 7/28
80/15 + 63/28 is 91/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
80/15 = 80 × 28/15 × 28 = 2240/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
63/28 = 63 × 15/28 × 15 = 945/420 - Add the two like fractions:
2240/420 + 945/420 = 2240 + 945/420 = 3185/420 - 3185/420 simplified gives 91/12
- So, 80/15 + 63/28 = 91/12
In mixed form: 77/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30+63/28 80/15+63/56 80/45+63/28 80/15+63/84 80/75+63/28