Add 45/12 and 42/49
1st number: 3 9/12, 2nd number: 42/49
45/12 + 42/49 is 129/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 49 is 588
Next, find the equivalent fraction of both fractional numbers with denominator 588 - For the 1st fraction, since 12 × 49 = 588,
45/12 = 45 × 49/12 × 49 = 2205/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
42/49 = 42 × 12/49 × 12 = 504/588 - Add the two like fractions:
2205/588 + 504/588 = 2205 + 504/588 = 2709/588 - 2709/588 simplified gives 129/28
- So, 45/12 + 42/49 = 129/28
In mixed form: 417/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+42/49 45/12+84/49 45/24+42/49 45/12+42/98 45/36+42/49 45/60+42/49 45/84+42/49