Add 21/56 and 56/20
1st number: 21/56, 2nd number: 2 16/20
21/56 + 56/20 is 127/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
56/20 = 56 × 14/20 × 14 = 784/280 - Add the two like fractions:
105/280 + 784/280 = 105 + 784/280 = 889/280 - 889/280 simplified gives 127/40
- So, 21/56 + 56/20 = 127/40
In mixed form: 37/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+56/20 21/56+56/40 63/56+56/20 21/56+56/60