Subtract 8/20 from 21/75
21/75 - 8/20 is -3/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 20 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 75 × 4 = 300,
21/75 = 21 × 4/75 × 4 = 84/300 - Likewise, for the 2nd fraction, since 20 × 15 = 300,
8/20 = 8 × 15/20 × 15 = 120/300 - Subtract the two like fractions:
84/300 - 120/300 = 84 - 120/300 = -36/300 - After reducing the fraction, the answer is -3/25
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