Add 21/8 and 12/27
1st number: 2 5/8, 2nd number: 12/27
21/8 + 12/27 is 221/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 8 × 27 = 216,
21/8 = 21 × 27/8 × 27 = 567/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
12/27 = 12 × 8/27 × 8 = 96/216 - Add the two like fractions:
567/216 + 96/216 = 567 + 96/216 = 663/216 - 663/216 simplified gives 221/72
- So, 21/8 + 12/27 = 221/72
In mixed form: 35/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+12/27 21/8+24/27 21/16+12/27 21/8+12/54 63/8+12/27 21/8+36/27 21/24+12/27 21/8+12/81 21/8+60/27 21/40+12/27 21/8+84/27 21/56+12/27