Subtract 18/80 from 63/84
63/84 - 18/80 is 21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
63/84 = 63 × 20/84 × 20 = 1260/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
18/80 = 18 × 21/80 × 21 = 378/1680 - Subtract the two like fractions:
1260/1680 - 378/1680 = 1260 - 378/1680 = 882/1680 - After reducing the fraction, the answer is 21/40
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