Subtract 42/4 from 90/20
1st number: 4 10/20, 2nd number: 10 2/4
90/20 - 42/4 is -6/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
90/20 = 90 × 1/20 × 1 = 90/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
42/4 = 42 × 5/4 × 5 = 210/20 - Subtract the two like fractions:
90/20 - 210/20 = 90 - 210/20 = -120/20 - After reducing the fraction, the answer is -6/1
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