Subtract 15/56 from 3/20
3/20 - 15/56 is -33/280.
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,
3/20 = 3 × 14/20 × 14 = 42/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
15/56 = 15 × 5/56 × 5 = 75/280 - Subtract the two like fractions:
42/280 - 75/280 = 42 - 75/280 = -33/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-15/56 3/20-30/56 3/40-15/56 9/20-15/56 3/20-45/56 3/60-15/56 15/20-15/56 3/20-75/56 21/20-15/56