Add 20/15 and 63/28
1st number: 1 5/15, 2nd number: 2 7/28
20/15 + 63/28 is 43/12.
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,
20/15 = 20 × 28/15 × 28 = 560/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
63/28 = 63 × 15/28 × 15 = 945/420 - Add the two like fractions:
560/420 + 945/420 = 560 + 945/420 = 1505/420 - 1505/420 simplified gives 43/12
- So, 20/15 + 63/28 = 43/12
In mixed form: 37/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+63/28 20/30+63/28 20/15+63/56 60/15+63/28 20/45+63/28 20/15+63/84 20/75+63/28