Subtract 20/50 from 5/81
5/81 - 20/50 is -137/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 50 is 4050
Next, find the equivalent fraction of both fractional numbers with denominator 4050 - For the 1st fraction, since 81 × 50 = 4050,
5/81 = 5 × 50/81 × 50 = 250/4050 - Likewise, for the 2nd fraction, since 50 × 81 = 4050,
20/50 = 20 × 81/50 × 81 = 1620/4050 - Subtract the two like fractions:
250/4050 - 1620/4050 = 250 - 1620/4050 = -1370/4050 - After reducing the fraction, the answer is -137/405
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