Add 45/21 and 14/12
1st number: 2 3/21, 2nd number: 1 2/12
45/21 + 14/12 is 139/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
14/12 = 14 × 7/12 × 7 = 98/84 - Add the two like fractions:
180/84 + 98/84 = 180 + 98/84 = 278/84 - 278/84 simplified gives 139/42
- So, 45/21 + 14/12 = 139/42
In mixed form: 313/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+14/12 45/21+28/12 45/42+14/12 45/21+14/24 45/21+42/12 45/63+14/12 45/21+14/36 45/21+70/12 45/21+14/60 45/21+98/12 45/21+14/84