Add 63/5 and 3/21
1st number: 12 3/5, 2nd number: 3/21
63/5 + 3/21 is 446/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
63/5 = 63 × 21/5 × 21 = 1323/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
3/21 = 3 × 5/21 × 5 = 15/105 - Add the two like fractions:
1323/105 + 15/105 = 1323 + 15/105 = 1338/105 - 1338/105 simplified gives 446/35
- So, 63/5 + 3/21 = 446/35
In mixed form: 1226/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/5+6/21 63/10+3/21 63/5+3/42 63/5+9/21 63/15+3/21 63/5+3/63 63/5+15/21 63/25+3/21 63/35+3/21