Subtract 42/56 from 21/50
21/50 - 42/56 is -33/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 56 is 1400
Next, find the equivalent fraction of both fractional numbers with denominator 1400 - For the 1st fraction, since 50 × 28 = 1400,
21/50 = 21 × 28/50 × 28 = 588/1400 - Likewise, for the 2nd fraction, since 56 × 25 = 1400,
42/56 = 42 × 25/56 × 25 = 1050/1400 - Subtract the two like fractions:
588/1400 - 1050/1400 = 588 - 1050/1400 = -462/1400 - After reducing the fraction, the answer is -33/100
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