Subtract 21/84 from 30/54
30/54 - 21/84 is 11/36.
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,
30/54 = 30 × 14/54 × 14 = 420/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
21/84 = 21 × 9/84 × 9 = 189/756 - Subtract the two like fractions:
420/756 - 189/756 = 420 - 189/756 = 231/756 - After reducing the fraction, the answer is 11/36
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