Subtract 25/28 from 12/90
12/90 - 25/28 is -319/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
12/90 = 12 × 14/90 × 14 = 168/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
25/28 = 25 × 45/28 × 45 = 1125/1260 - Subtract the two like fractions:
168/1260 - 1125/1260 = 168 - 1125/1260 = -957/1260 - After reducing the fraction, the answer is -319/420
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