Add 2/21 and 1/20
2/21 + 1/20 is 61/420.
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,
2/21 = 2 × 20/21 × 20 = 40/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
1/20 = 1 × 21/20 × 21 = 21/420 - Add the two like fractions:
40/420 + 21/420 = 40 + 21/420 = 61/420 - So, 2/21 + 1/20 = 61/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+1/20 2/21+2/20 2/42+1/20 2/21+1/40 6/21+1/20 2/21+3/20 2/63+1/20 2/21+1/60 10/21+1/20 2/21+5/20 14/21+1/20 2/21+7/20