Add 56/35 and 21/84
1st number: 1 21/35, 2nd number: 21/84
56/35 + 21/84 is 37/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 35 × 12 = 420,
56/35 = 56 × 12/35 × 12 = 672/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
672/420 + 105/420 = 672 + 105/420 = 777/420 - 777/420 simplified gives 37/20
- So, 56/35 + 21/84 = 37/20
In mixed form: 117/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/35+42/84 56/70+21/84 56/35+63/84