Add 1/42 and 7/21
1/42 + 7/21 is 5/14.
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,
1/42 = 1 × 1/42 × 1 = 1/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
7/21 = 7 × 2/21 × 2 = 14/42 - Add the two like fractions:
1/42 + 14/42 = 1 + 14/42 = 15/42 - 15/42 simplified gives 5/14
- So, 1/42 + 7/21 = 5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+7/21 1/42+14/21 1/84+7/21 1/42+7/42 3/42+7/21 1/42+7/63 5/42+7/21 1/42+35/21 7/42+7/21 1/42+49/21