Add 20/21 and 6/63
20/21 + 6/63 is 22/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
20/21 = 20 × 3/21 × 3 = 60/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
6/63 = 6 × 1/63 × 1 = 6/63 - Add the two like fractions:
60/63 + 6/63 = 60 + 6/63 = 66/63 - 66/63 simplified gives 22/21
- So, 20/21 + 6/63 = 22/21
In mixed form: 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+6/63 20/21+12/63 20/42+6/63 60/21+6/63 20/21+18/63 20/63+6/63 20/21+30/63 20/21+42/63