Add 45/12 and 30/28
1st number: 3 9/12, 2nd number: 1 2/28
45/12 + 30/28 is 135/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 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 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Add the two like fractions:
315/84 + 90/84 = 315 + 90/84 = 405/84 - 405/84 simplified gives 135/28
- So, 45/12 + 30/28 = 135/28
In mixed form: 423/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+30/28 45/12+60/28 45/24+30/28 45/12+30/56 45/12+90/28 45/36+30/28 45/12+30/84 45/60+30/28 45/84+30/28