Add 15/28 and 63/40
1st number: 15/28, 2nd number: 1 23/40
15/28 + 63/40 is 591/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
15/28 = 15 × 10/28 × 10 = 150/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
63/40 = 63 × 7/40 × 7 = 441/280 - Add the two like fractions:
150/280 + 441/280 = 150 + 441/280 = 591/280 - So, 15/28 + 63/40 = 591/280
In mixed form: 231/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+63/40 15/56+63/40 15/28+63/80 45/28+63/40 15/84+63/40 75/28+63/40