Add 20/72 and 21/8
1st number: 20/72, 2nd number: 2 5/8
20/72 + 21/8 is 209/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
20/72 = 20 × 1/72 × 1 = 20/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Add the two like fractions:
20/72 + 189/72 = 20 + 189/72 = 209/72 - So, 20/72 + 21/8 = 209/72
In mixed form: 265/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72+21/8 20/72+42/8 20/72+21/16 60/72+21/8 20/72+63/8 20/72+21/24 20/72+21/40 20/72+21/56