Subtract 20/45 from 18/84
18/84 - 20/45 is -29/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
18/84 = 18 × 15/84 × 15 = 270/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
20/45 = 20 × 28/45 × 28 = 560/1260 - Subtract the two like fractions:
270/1260 - 560/1260 = 270 - 560/1260 = -290/1260 - After reducing the fraction, the answer is -29/126
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