Add 7/72 and 21/27
7/72 + 21/27 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
7/72 = 7 × 3/72 × 3 = 21/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Add the two like fractions:
21/216 + 168/216 = 21 + 168/216 = 189/216 - 189/216 simplified gives 7/8
- So, 7/72 + 21/27 = 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72+21/27 7/72+42/27 7/72+21/54 21/72+21/27 7/72+63/27 7/72+21/81 35/72+21/27 49/72+21/27