Subtract 12/40 from 21/75
21/75 - 12/40 is -1/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
21/75 = 21 × 8/75 × 8 = 168/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
12/40 = 12 × 15/40 × 15 = 180/600 - Subtract the two like fractions:
168/600 - 180/600 = 168 - 180/600 = -12/600 - After reducing the fraction, the answer is -1/50
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