Subtract 18/80 from 6/8
6/8 - 18/80 is 21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 8 × 10 = 80,
6/8 = 6 × 10/8 × 10 = 60/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
60/80 - 18/80 = 60 - 18/80 = 42/80 - After reducing the fraction, the answer is 21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/8-18/80 6/8-36/80 6/16-18/80 18/8-18/80 6/8-54/80 6/24-18/80 30/8-18/80 6/8-90/80 6/40-18/80 42/8-18/80 6/56-18/80