Subtract 42/45 from 42/50
42/50 - 42/45 is -7/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 45 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Likewise, for the 2nd fraction, since 45 × 10 = 450,
42/45 = 42 × 10/45 × 10 = 420/450 - Subtract the two like fractions:
378/450 - 420/450 = 378 - 420/450 = -42/450 - After reducing the fraction, the answer is -7/75
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