Subtract 20/84 from 15/27
15/27 - 20/84 is 20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
15/27 = 15 × 28/27 × 28 = 420/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
20/84 = 20 × 9/84 × 9 = 180/756 - Subtract the two like fractions:
420/756 - 180/756 = 420 - 180/756 = 240/756 - After reducing the fraction, the answer is 20/63
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