Add 21/8 and 84/27
1st number: 2 5/8, 2nd number: 3 3/27
21/8 + 84/27 is 413/72.
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,
84/27 = 84 × 8/27 × 8 = 672/216 - Add the two like fractions:
567/216 + 672/216 = 567 + 672/216 = 1239/216 - 1239/216 simplified gives 413/72
- So, 21/8 + 84/27 = 413/72
In mixed form: 553/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+84/27 21/16+84/27 21/8+84/54 63/8+84/27 21/24+84/27 21/8+84/81 21/40+84/27 21/56+84/27