Add 28/36 and 50/21
1st number: 28/36, 2nd number: 2 8/21
28/36 + 50/21 is 199/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
28/36 = 28 × 7/36 × 7 = 196/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
50/21 = 50 × 12/21 × 12 = 600/252 - Add the two like fractions:
196/252 + 600/252 = 196 + 600/252 = 796/252 - 796/252 simplified gives 199/63
- So, 28/36 + 50/21 = 199/63
In mixed form: 310/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/36+50/21 28/72+50/21 28/36+50/42 84/36+50/21 28/36+50/63