Add 45/12 and 1/7
1st number: 3 9/12, 2nd number: 1/7
45/12 + 1/7 is 109/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
1/7 = 1 × 12/7 × 12 = 12/84 - Add the two like fractions:
315/84 + 12/84 = 315 + 12/84 = 327/84 - 327/84 simplified gives 109/28
- So, 45/12 + 1/7 = 109/28
In mixed form: 325/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+1/7 45/12+2/7 45/24+1/7 45/12+1/14 45/12+3/7 45/36+1/7 45/12+1/21 45/12+5/7 45/60+1/7 45/12+1/35 45/84+1/7 45/12+1/49