Subtract 72/84 from 18/50
18/50 - 72/84 is -87/175.
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,
18/50 = 18 × 42/50 × 42 = 756/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
72/84 = 72 × 25/84 × 25 = 1800/2100 - Subtract the two like fractions:
756/2100 - 1800/2100 = 756 - 1800/2100 = -1044/2100 - After reducing the fraction, the answer is -87/175
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