Add 35/42 and 8/21
35/42 + 8/21 is 17/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
35/42 = 35 × 1/42 × 1 = 35/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Add the two like fractions:
35/42 + 16/42 = 35 + 16/42 = 51/42 - 51/42 simplified gives 17/14
- So, 35/42 + 8/21 = 17/14
In mixed form: 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+8/21 35/42+16/21 35/84+8/21 35/42+8/42 35/42+24/21 35/42+8/63 35/42+40/21 35/42+56/21