Subtract 6/84 from 21/54
21/54 - 6/84 is 20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 54 × 14 = 756,
21/54 = 21 × 14/54 × 14 = 294/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
6/84 = 6 × 9/84 × 9 = 54/756 - Subtract the two like fractions:
294/756 - 54/756 = 294 - 54/756 = 240/756 - After reducing the fraction, the answer is 20/63
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