Subtract 42/20 from 2/90
1st number: 2/90, 2nd number: 2 2/20
2/90 - 42/20 is -187/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
2/90 = 2 × 2/90 × 2 = 4/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Subtract the two like fractions:
4/180 - 378/180 = 4 - 378/180 = -374/180 - After reducing the fraction, the answer is -187/90
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