Add 21/3 and 15/63
1st number: 7 0/3, 2nd number: 15/63
21/3 + 15/63 is 152/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 3 × 21 = 63,
21/3 = 21 × 21/3 × 21 = 441/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
15/63 = 15 × 1/63 × 1 = 15/63 - Add the two like fractions:
441/63 + 15/63 = 441 + 15/63 = 456/63 - 456/63 simplified gives 152/21
- So, 21/3 + 15/63 = 152/21
In mixed form: 75/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+15/63 21/3+30/63 21/6+15/63 63/3+15/63 21/3+45/63 21/9+15/63 21/3+75/63 21/15+15/63