Add 27/36 and 1/21
27/36 + 1/21 is 67/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
27/36 = 27 × 7/36 × 7 = 189/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
1/21 = 1 × 12/21 × 12 = 12/252 - Add the two like fractions:
189/252 + 12/252 = 189 + 12/252 = 201/252 - 201/252 simplified gives 67/84
- So, 27/36 + 1/21 = 67/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/36+1/21 27/36+2/21 27/72+1/21 27/36+1/42 81/36+1/21 27/36+3/21 27/36+1/63 27/36+5/21 27/36+7/21