Add 28/21 and 3/63
1st number: 1 7/21, 2nd number: 3/63
28/21 + 3/63 is 29/21.
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,
28/21 = 28 × 3/21 × 3 = 84/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
3/63 = 3 × 1/63 × 1 = 3/63 - Add the two like fractions:
84/63 + 3/63 = 84 + 3/63 = 87/63 - 87/63 simplified gives 29/21
- So, 28/21 + 3/63 = 29/21
In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+3/63 28/21+6/63 28/42+3/63 84/21+3/63 28/21+9/63 28/63+3/63 28/21+15/63 28/21+21/63