Subtract 75/90 from 20/28
20/28 - 75/90 is -5/42.
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,
20/28 = 20 × 45/28 × 45 = 900/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
75/90 = 75 × 14/90 × 14 = 1050/1260 - Subtract the two like fractions:
900/1260 - 1050/1260 = 900 - 1050/1260 = -150/1260 - After reducing the fraction, the answer is -5/42
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