Add 3/21 and 4/36
3/21 + 4/36 is 16/63.
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,
3/21 = 3 × 12/21 × 12 = 36/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
4/36 = 4 × 7/36 × 7 = 28/252 - Add the two like fractions:
36/252 + 28/252 = 36 + 28/252 = 64/252 - 64/252 simplified gives 16/63
- So, 3/21 + 4/36 = 16/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+4/36 3/21+8/36 3/42+4/36 3/21+4/72 9/21+4/36 3/21+12/36 3/63+4/36 15/21+4/36 3/21+20/36 3/21+28/36