Add 81/28 and 63/40
1st number: 2 25/28, 2nd number: 1 23/40
81/28 + 63/40 is 1251/280.
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,
81/28 = 81 × 10/28 × 10 = 810/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
63/40 = 63 × 7/40 × 7 = 441/280 - Add the two like fractions:
810/280 + 441/280 = 810 + 441/280 = 1251/280 - So, 81/28 + 63/40 = 1251/280
In mixed form: 4131/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/56+63/40 81/28+63/80 81/84+63/40