Subtract 30/75 from 21/56
21/56 - 30/75 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 75 is 4200
Next, find the equivalent fraction of both fractional numbers with denominator 4200 - For the 1st fraction, since 56 × 75 = 4200,
21/56 = 21 × 75/56 × 75 = 1575/4200 - Likewise, for the 2nd fraction, since 75 × 56 = 4200,
30/75 = 30 × 56/75 × 56 = 1680/4200 - Subtract the two like fractions:
1575/4200 - 1680/4200 = 1575 - 1680/4200 = -105/4200 - After reducing the fraction, the answer is -1/40
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