Subtract 8/80 from 16/18
16/18 - 8/80 is 71/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
16/18 = 16 × 40/18 × 40 = 640/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
8/80 = 8 × 9/80 × 9 = 72/720 - Subtract the two like fractions:
640/720 - 72/720 = 640 - 72/720 = 568/720 - After reducing the fraction, the answer is 71/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/18-8/80 16/18-16/80 16/36-8/80 48/18-8/80 16/18-24/80 16/54-8/80 80/18-8/80 16/18-40/80 16/90-8/80 16/18-56/80