Add 63/21 and 7/20
1st number: 3 0/21, 2nd number: 7/20
63/21 + 7/20 is 67/20.
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,
7/20 = 7 × 21/20 × 21 = 147/420 - Add the two like fractions:
1260/420 + 147/420 = 1260 + 147/420 = 1407/420 - 1407/420 simplified gives 67/20
- So, 63/21 + 7/20 = 67/20
In mixed form: 37/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+14/20 63/42+7/20 63/21+7/40 63/21+21/20 63/21+7/60 63/21+35/20 63/21+49/20