Add 63/21 and 9/20
1st number: 3 0/21, 2nd number: 9/20
63/21 + 9/20 is 69/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
63/21 = 63 × 20/21 × 20 = 1260/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
9/20 = 9 × 21/20 × 21 = 189/420 - Add the two like fractions:
1260/420 + 189/420 = 1260 + 189/420 = 1449/420 - 1449/420 simplified gives 69/20
- So, 63/21 + 9/20 = 69/20
In mixed form: 39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+18/20 63/42+9/20 63/21+9/40 63/21+27/20 63/21+9/60 63/21+45/20 63/21+63/20