Add 30/21 and 63/36
1st number: 1 9/21, 2nd number: 1 27/36
30/21 + 63/36 is 89/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
30/21 = 30 × 12/21 × 12 = 360/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
63/36 = 63 × 7/36 × 7 = 441/252 - Add the two like fractions:
360/252 + 441/252 = 360 + 441/252 = 801/252 - 801/252 simplified gives 89/28
- So, 30/21 + 63/36 = 89/28
In mixed form: 35/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+63/36 30/42+63/36 30/21+63/72 90/21+63/36 30/63+63/36