Subtract 45/84 from 20/50
20/50 - 45/84 is -19/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 84 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 50 × 42 = 2100,
20/50 = 20 × 42/50 × 42 = 840/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
45/84 = 45 × 25/84 × 25 = 1125/2100 - Subtract the two like fractions:
840/2100 - 1125/2100 = 840 - 1125/2100 = -285/2100 - After reducing the fraction, the answer is -19/140
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