Add 6/21 and 56/20
1st number: 6/21, 2nd number: 2 16/20
6/21 + 56/20 is 108/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
6/21 = 6 × 20/21 × 20 = 120/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
56/20 = 56 × 21/20 × 21 = 1176/420 - Add the two like fractions:
120/420 + 1176/420 = 120 + 1176/420 = 1296/420 - 1296/420 simplified gives 108/35
- So, 6/21 + 56/20 = 108/35
In mixed form: 33/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+56/20 6/42+56/20 6/21+56/40 18/21+56/20 6/63+56/20 6/21+56/60 30/21+56/20 42/21+56/20