Subtract 42/80 from 8/9
8/9 - 42/80 is 131/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
8/9 = 8 × 80/9 × 80 = 640/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Subtract the two like fractions:
640/720 - 378/720 = 640 - 378/720 = 262/720 - After reducing the fraction, the answer is 131/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9-42/80 8/9-84/80 8/18-42/80 24/9-42/80 8/27-42/80 40/9-42/80 8/45-42/80 56/9-42/80 8/63-42/80