Add 81/28 and 64/5
1st number: 2 25/28, 2nd number: 12 4/5
81/28 + 64/5 is 2197/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
81/28 = 81 × 5/28 × 5 = 405/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
64/5 = 64 × 28/5 × 28 = 1792/140 - Add the two like fractions:
405/140 + 1792/140 = 405 + 1792/140 = 2197/140 - So, 81/28 + 64/5 = 2197/140
In mixed form: 1597/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/56+64/5 81/28+64/10 81/84+64/5 81/28+64/15 81/28+64/25 81/28+64/35