Subtract 20/25 from 9/45
9/45 - 20/25 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 25 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 45 × 5 = 225,
9/45 = 9 × 5/45 × 5 = 45/225 - Likewise, for the 2nd fraction, since 25 × 9 = 225,
20/25 = 20 × 9/25 × 9 = 180/225 - Subtract the two like fractions:
45/225 - 180/225 = 45 - 180/225 = -135/225 - After reducing the fraction, the answer is -3/5
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