Add 12/27 and 21/72
12/27 + 21/72 is 53/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 72 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 27 × 8 = 216,
12/27 = 12 × 8/27 × 8 = 96/216 - Likewise, for the 2nd fraction, since 72 × 3 = 216,
21/72 = 21 × 3/72 × 3 = 63/216 - Add the two like fractions:
96/216 + 63/216 = 96 + 63/216 = 159/216 - 159/216 simplified gives 53/72
- So, 12/27 + 21/72 = 53/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27+21/72 12/27+42/72 12/54+21/72 36/27+21/72 12/27+63/72 12/81+21/72 60/27+21/72 84/27+21/72