Subtract 21/36 from 42/75
42/75 - 21/36 is -7/300.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 36 is 900
Next, find the equivalent fraction of both fractional numbers with denominator 900 - For the 1st fraction, since 75 × 12 = 900,
42/75 = 42 × 12/75 × 12 = 504/900 - Likewise, for the 2nd fraction, since 36 × 25 = 900,
21/36 = 21 × 25/36 × 25 = 525/900 - Subtract the two like fractions:
504/900 - 525/900 = 504 - 525/900 = -21/900 - After reducing the fraction, the answer is -7/300
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