Add 21/28 and 24/35
21/28 + 24/35 is 201/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
24/35 = 24 × 4/35 × 4 = 96/140 - Add the two like fractions:
105/140 + 96/140 = 105 + 96/140 = 201/140 - So, 21/28 + 24/35 = 201/140
In mixed form: 161/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+24/35 21/28+48/35 21/56+24/35 21/28+24/70 63/28+24/35 21/28+72/35 21/84+24/35