Subtract 80/56 from 18/20
1st number: 18/20, 2nd number: 1 24/56
18/20 - 80/56 is -37/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
18/20 = 18 × 14/20 × 14 = 252/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
80/56 = 80 × 5/56 × 5 = 400/280 - Subtract the two like fractions:
252/280 - 400/280 = 252 - 400/280 = -148/280 - After reducing the fraction, the answer is -37/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-80/56 18/40-80/56 54/20-80/56 18/60-80/56 90/20-80/56