Add 50/21 and 81/20
1st number: 2 8/21, 2nd number: 4 1/20
50/21 + 81/20 is 2701/420.
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,
50/21 = 50 × 20/21 × 20 = 1000/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
81/20 = 81 × 21/20 × 21 = 1701/420 - Add the two like fractions:
1000/420 + 1701/420 = 1000 + 1701/420 = 2701/420 - So, 50/21 + 81/20 = 2701/420
In mixed form: 6181/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+81/20 50/21+81/40 50/63+81/20 50/21+81/60