Add 21/4 and 56/15
1st number: 5 1/4, 2nd number: 3 11/15
21/4 + 56/15 is 539/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
21/4 = 21 × 15/4 × 15 = 315/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
56/15 = 56 × 4/15 × 4 = 224/60 - Add the two like fractions:
315/60 + 224/60 = 315 + 224/60 = 539/60 - So, 21/4 + 56/15 = 539/60
In mixed form: 859/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+56/15 21/8+56/15 21/4+56/30 63/4+56/15 21/12+56/15 21/4+56/45 21/20+56/15 21/4+56/75 21/28+56/15