Subtract 15/8 from 8/9
1st number: 8/9, 2nd number: 1 7/8
89 - 158 is -7172.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
89 = 8 × 89 × 8 = 6472 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
158 = 15 × 98 × 9 = 13572 - Subtract the two like fractions:
6472 - 13572 = 64 - 13572 = -7172
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9-15/8 8/9-30/8 8/18-15/8 8/9-15/16 24/9-15/8 8/9-45/8 8/27-15/8 8/9-15/24 40/9-15/8 8/9-75/8 8/45-15/8 8/9-15/40 56/9-15/8 8/63-15/8 8/9-15/56