Add 5/21 and 56/20
1st number: 5/21, 2nd number: 2 16/20
5/21 + 56/20 is 319/105.
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,
5/21 = 5 × 20/21 × 20 = 100/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
56/20 = 56 × 21/20 × 21 = 1176/420 - Add the two like fractions:
100/420 + 1176/420 = 100 + 1176/420 = 1276/420 - 1276/420 simplified gives 319/105
- So, 5/21 + 56/20 = 319/105
In mixed form: 34/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+56/20 5/42+56/20 5/21+56/40 15/21+56/20 5/63+56/20 5/21+56/60 25/21+56/20 35/21+56/20