Add 15/30 and 63/28
1st number: 15/30, 2nd number: 2 7/28
15/30 + 63/28 is 11/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
15/30 = 15 × 14/30 × 14 = 210/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
63/28 = 63 × 15/28 × 15 = 945/420 - Add the two like fractions:
210/420 + 945/420 = 210 + 945/420 = 1155/420 - 1155/420 simplified gives 11/4
- So, 15/30 + 63/28 = 11/4
In mixed form: 23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/60+63/28 15/30+63/56 45/30+63/28 15/90+63/28 15/30+63/84 75/30+63/28