Add 20/18 and 63/8
1st number: 1 2/18, 2nd number: 7 7/8
20/18 + 63/8 is 647/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
20/18 = 20 × 4/18 × 4 = 80/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
63/8 = 63 × 9/8 × 9 = 567/72 - Add the two like fractions:
80/72 + 567/72 = 80 + 567/72 = 647/72 - So, 20/18 + 63/8 = 647/72
In mixed form: 871/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+63/8 20/36+63/8 20/18+63/16 60/18+63/8 20/54+63/8 20/18+63/24 20/90+63/8 20/18+63/40 20/18+63/56