Add 8/21 and 63/15
1st number: 8/21, 2nd number: 4 3/15
8/21 + 63/15 is 481/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
8/21 = 8 × 5/21 × 5 = 40/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
63/15 = 63 × 7/15 × 7 = 441/105 - Add the two like fractions:
40/105 + 441/105 = 40 + 441/105 = 481/105 - So, 8/21 + 63/15 = 481/105
In mixed form: 461/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+63/15 8/42+63/15 8/21+63/30 24/21+63/15 8/63+63/15 8/21+63/45 40/21+63/15 8/21+63/75 56/21+63/15