Add 7/21 and 2/72
7/21 + 2/72 is 13/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
7/21 = 7 × 24/21 × 24 = 168/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
2/72 = 2 × 7/72 × 7 = 14/504 - Add the two like fractions:
168/504 + 14/504 = 168 + 14/504 = 182/504 - 182/504 simplified gives 13/36
- So, 7/21 + 2/72 = 13/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+2/72 7/21+4/72 7/42+2/72 7/21+6/72 7/63+2/72 35/21+2/72 7/21+10/72 49/21+2/72 7/21+14/72