Subtract 45/54 from 4/20
4/20 - 45/54 is -19/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
4/20 = 4 × 27/20 × 27 = 108/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
45/54 = 45 × 10/54 × 10 = 450/540 - Subtract the two like fractions:
108/540 - 450/540 = 108 - 450/540 = -342/540 - After reducing the fraction, the answer is -19/30
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