Subtract 18/20 from 45/56
45/56 - 18/20 is -27/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
45/56 = 45 × 5/56 × 5 = 225/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
18/20 = 18 × 14/20 × 14 = 252/280 - Subtract the two like fractions:
225/280 - 252/280 = 225 - 252/280 = -27/280
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