Subtract 90/81 from 42/50
1st number: 42/50, 2nd number: 1 9/81
42/50 - 90/81 is -61/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 81 is 4050
Next, find the equivalent fraction of both fractional numbers with denominator 4050 - For the 1st fraction, since 50 × 81 = 4050,
42/50 = 42 × 81/50 × 81 = 3402/4050 - Likewise, for the 2nd fraction, since 81 × 50 = 4050,
90/81 = 90 × 50/81 × 50 = 4500/4050 - Subtract the two like fractions:
3402/4050 - 4500/4050 = 3402 - 4500/4050 = -1098/4050 - After reducing the fraction, the answer is -61/225
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Related: 84/50-90/81