Subtract 30/90 from 3/28
3/28 - 30/90 is -19/84.
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,
3/28 = 3 × 45/28 × 45 = 135/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
30/90 = 30 × 14/90 × 14 = 420/1260 - Subtract the two like fractions:
135/1260 - 420/1260 = 135 - 420/1260 = -285/1260 - After reducing the fraction, the answer is -19/84
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