Add 56/21 and 45/15
1st number: 2 14/21, 2nd number: 3 0/15
56/21 + 45/15 is 17/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
56/21 = 56 × 5/21 × 5 = 280/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
45/15 = 45 × 7/15 × 7 = 315/105 - Add the two like fractions:
280/105 + 315/105 = 280 + 315/105 = 595/105 - 595/105 simplified gives 17/3
- So, 56/21 + 45/15 = 17/3
In mixed form: 52/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+90/15 56/42+45/15 56/21+45/30 56/63+45/15 56/21+45/75