Subtract 20/80 from 16/18
16/18 - 20/80 is 23/36.
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,
20/80 = 20 × 9/80 × 9 = 180/720 - Subtract the two like fractions:
640/720 - 180/720 = 640 - 180/720 = 460/720 - After reducing the fraction, the answer is 23/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/18-20/80 16/18-40/80 16/36-20/80 48/18-20/80 16/18-60/80 16/54-20/80 80/18-20/80 16/90-20/80