Add 28/21 and 35/42
1st number: 1 7/21, 2nd number: 35/42
28/21 + 35/42 is 13/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
35/42 = 35 × 1/42 × 1 = 35/42 - Add the two like fractions:
56/42 + 35/42 = 56 + 35/42 = 91/42 - 91/42 simplified gives 13/6
- So, 28/21 + 35/42 = 13/6
In mixed form: 21/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+35/42 28/21+70/42 28/42+35/42 28/21+35/84 84/21+35/42 28/63+35/42