Add 63/21 and 9/15
1st number: 3 0/21, 2nd number: 9/15
63/21 + 9/15 is 18/5.
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,
63/21 = 63 × 5/21 × 5 = 315/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
9/15 = 9 × 7/15 × 7 = 63/105 - Add the two like fractions:
315/105 + 63/105 = 315 + 63/105 = 378/105 - 378/105 simplified gives 18/5
- So, 63/21 + 9/15 = 18/5
In mixed form: 33/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+18/15 63/42+9/15 63/21+9/30 63/21+27/15 63/21+9/45 63/21+45/15 63/21+9/75 63/21+63/15