Add 20/21 and 1/4
20/21 + 1/4 is 101/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
20/21 = 20 × 4/21 × 4 = 80/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
1/4 = 1 × 21/4 × 21 = 21/84 - Add the two like fractions:
80/84 + 21/84 = 80 + 21/84 = 101/84 - So, 20/21 + 1/4 = 101/84
In mixed form: 117/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+1/4 20/21+2/4 20/42+1/4 20/21+1/8 60/21+1/4 20/21+3/4 20/63+1/4 20/21+1/12 20/21+5/4 20/21+1/20 20/21+7/4 20/21+1/28