Subtract 42/90 from 4/28
4/28 - 42/90 is -34/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
4/28 = 4 × 45/28 × 45 = 180/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
42/90 = 42 × 14/90 × 14 = 588/1260 - Subtract the two like fractions:
180/1260 - 588/1260 = 180 - 588/1260 = -408/1260 - After reducing the fraction, the answer is -34/105
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