Add 21/12 and 14/42
1st number: 1 9/12, 2nd number: 14/42
21/12 + 14/42 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
21/12 = 21 × 7/12 × 7 = 147/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
14/42 = 14 × 2/42 × 2 = 28/84 - Add the two like fractions:
147/84 + 28/84 = 147 + 28/84 = 175/84 - 175/84 simplified gives 25/12
- So, 21/12 + 14/42 = 25/12
In mixed form: 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+14/42 21/12+28/42 21/24+14/42 21/12+14/84 63/12+14/42 21/36+14/42 21/12+70/42 21/60+14/42 21/12+98/42 21/84+14/42