Subtract 45/75 from 9/20
9/20 - 45/75 is -3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 75 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 20 × 15 = 300,
9/20 = 9 × 15/20 × 15 = 135/300 - Likewise, for the 2nd fraction, since 75 × 4 = 300,
45/75 = 45 × 4/75 × 4 = 180/300 - Subtract the two like fractions:
135/300 - 180/300 = 135 - 180/300 = -45/300 - After reducing the fraction, the answer is -3/20
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