Add 1/21 and 5/20
1/21 + 5/20 is 25/84.
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,
1/21 = 1 × 20/21 × 20 = 20/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Add the two like fractions:
20/420 + 105/420 = 20 + 105/420 = 125/420 - 125/420 simplified gives 25/84
- So, 1/21 + 5/20 = 25/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+5/20 1/21+10/20 1/42+5/20 1/21+5/40 3/21+5/20 1/21+15/20 1/63+5/20 1/21+5/60 5/21+5/20 1/21+25/20 7/21+5/20 1/21+35/20