Add 5/15 and 56/21
1st number: 5/15, 2nd number: 2 14/21
5/15 + 56/21 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
5/15 = 5 × 7/15 × 7 = 35/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
56/21 = 56 × 5/21 × 5 = 280/105 - Add the two like fractions:
35/105 + 280/105 = 35 + 280/105 = 315/105 - 315/105 simplified gives 3/1
- So, 5/15 + 56/21 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+56/21 5/30+56/21 5/15+56/42 5/45+56/21 5/15+56/63 25/15+56/21 5/75+56/21 35/15+56/21