Add 7/42 and 14/21
7/42 + 14/21 is 5/6.
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,
7/42 = 7 × 1/42 × 1 = 7/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
14/21 = 14 × 2/21 × 2 = 28/42 - Add the two like fractions:
7/42 + 28/42 = 7 + 28/42 = 35/42 - 35/42 simplified gives 5/6
- So, 7/42 + 14/21 = 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+14/21 7/42+28/21 7/84+14/21 7/42+14/42 21/42+14/21 7/42+42/21 7/42+14/63 35/42+14/21 7/42+70/21 49/42+14/21 7/42+98/21