Subtract 8/9 from 63/80
63/80 - 8/9 is -73/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
63/80 = 63 × 9/80 × 9 = 567/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
8/9 = 8 × 80/9 × 80 = 640/720 - Subtract the two like fractions:
567/720 - 640/720 = 567 - 640/720 = -73/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/80-16/9 63/80-8/18 63/80-24/9 63/80-8/27 63/80-40/9 63/80-8/45 63/80-56/9 63/80-8/63