Add 7/21 and 35/4
1st number: 7/21, 2nd number: 8 3/4
7/21 + 35/4 is 109/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
7/21 = 7 × 4/21 × 4 = 28/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
35/4 = 35 × 21/4 × 21 = 735/84 - Add the two like fractions:
28/84 + 735/84 = 28 + 735/84 = 763/84 - 763/84 simplified gives 109/12
- So, 7/21 + 35/4 = 109/12
In mixed form: 91/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+35/4 7/21+70/4 7/42+35/4 7/21+35/8 7/63+35/4 7/21+35/12 35/21+35/4 7/21+35/20 49/21+35/4 7/21+35/28