Subtract 75/90 from 12/28
12/28 - 75/90 is -17/42.
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,
12/28 = 12 × 45/28 × 45 = 540/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
75/90 = 75 × 14/90 × 14 = 1050/1260 - Subtract the two like fractions:
540/1260 - 1050/1260 = 540 - 1050/1260 = -510/1260 - After reducing the fraction, the answer is -17/42
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