Add 20/21 and 6/36
20/21 + 6/36 is 47/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
20/21 = 20 × 12/21 × 12 = 240/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
6/36 = 6 × 7/36 × 7 = 42/252 - Add the two like fractions:
240/252 + 42/252 = 240 + 42/252 = 282/252 - 282/252 simplified gives 47/42
- So, 20/21 + 6/36 = 47/42
In mixed form: 15/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+6/36 20/21+12/36 20/42+6/36 20/21+6/72 60/21+6/36 20/21+18/36 20/63+6/36 20/21+30/36 20/21+42/36