Add 12/21 and 3/63
12/21 + 3/63 is 13/21.
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,
12/21 = 12 × 3/21 × 3 = 36/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
3/63 = 3 × 1/63 × 1 = 3/63 - Add the two like fractions:
36/63 + 3/63 = 36 + 3/63 = 39/63 - 39/63 simplified gives 13/21
- So, 12/21 + 3/63 = 13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+3/63 12/21+6/63 12/42+3/63 36/21+3/63 12/21+9/63 12/63+3/63 60/21+3/63 12/21+15/63 84/21+3/63 12/21+21/63