Subtract 45/56 from 21/20
1st number: 1 1/20, 2nd number: 45/56
21/20 - 45/56 is 69/280.
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,
21/20 = 21 × 14/20 × 14 = 294/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
45/56 = 45 × 5/56 × 5 = 225/280 - Subtract the two like fractions:
294/280 - 225/280 = 294 - 225/280 = 69/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-45/56 21/20-90/56 21/40-45/56 63/20-45/56 21/60-45/56