Add 21/28 and 4/35
21/28 + 4/35 is 121/140.
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,
4/35 = 4 × 4/35 × 4 = 16/140 - Add the two like fractions:
105/140 + 16/140 = 105 + 16/140 = 121/140 - So, 21/28 + 4/35 = 121/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+4/35 21/28+8/35 21/56+4/35 21/28+4/70 63/28+4/35 21/28+12/35 21/84+4/35 21/28+20/35 21/28+28/35