Add 63/5 and 45/21
1st number: 12 3/5, 2nd number: 2 3/21
63/5 + 45/21 is 516/35.
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,
45/21 = 45 × 5/21 × 5 = 225/105 - Add the two like fractions:
1323/105 + 225/105 = 1323 + 225/105 = 1548/105 - 1548/105 simplified gives 516/35
- So, 63/5 + 45/21 = 516/35
In mixed form: 1426/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/5+90/21 63/10+45/21 63/5+45/42 63/15+45/21 63/5+45/63 63/25+45/21 63/35+45/21