Add 50/12 and 30/21
1st number: 4 2/12, 2nd number: 1 9/21
50/12 + 30/21 is 235/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
50/12 = 50 × 7/12 × 7 = 350/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Add the two like fractions:
350/84 + 120/84 = 350 + 120/84 = 470/84 - 470/84 simplified gives 235/42
- So, 50/12 + 30/21 = 235/42
In mixed form: 525/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/12+60/21 50/24+30/21 50/12+30/42 50/12+90/21 50/36+30/21 50/12+30/63 50/60+30/21 50/84+30/21