Add 35/21 and 42/7
1st number: 1 14/21, 2nd number: 6 0/7
35/21 + 42/7 is 23/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
35/21 = 35 × 1/21 × 1 = 35/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
42/7 = 42 × 3/7 × 3 = 126/21 - Add the two like fractions:
35/21 + 126/21 = 35 + 126/21 = 161/21 - 161/21 simplified gives 23/3
- So, 35/21 + 42/7 = 23/3
In mixed form: 72/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+42/7 35/21+84/7 35/42+42/7 35/21+42/14 35/63+42/7 35/21+42/21 35/21+42/35 35/21+42/49