Add 12/21 and 63/60
1st number: 12/21, 2nd number: 1 3/60
12/21 + 63/60 is 227/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
12/21 = 12 × 20/21 × 20 = 240/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
63/60 = 63 × 7/60 × 7 = 441/420 - Add the two like fractions:
240/420 + 441/420 = 240 + 441/420 = 681/420 - 681/420 simplified gives 227/140
- So, 12/21 + 63/60 = 227/140
In mixed form: 187/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+63/60 12/42+63/60 36/21+63/60 12/63+63/60 60/21+63/60 84/21+63/60