Add 24/28 and 81/20
1st number: 24/28, 2nd number: 4 1/20
24/28 + 81/20 is 687/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
24/28 = 24 × 5/28 × 5 = 120/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Add the two like fractions:
120/140 + 567/140 = 120 + 567/140 = 687/140 - So, 24/28 + 81/20 = 687/140
In mixed form: 4127/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/28+81/20 24/56+81/20 24/28+81/40 72/28+81/20 24/84+81/20 24/28+81/60