Subtract 18/70 from 18/84
18/84 - 18/70 is -3/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
18/84 = 18 × 5/84 × 5 = 90/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
18/70 = 18 × 6/70 × 6 = 108/420 - Subtract the two like fractions:
90/420 - 108/420 = 90 - 108/420 = -18/420 - After reducing the fraction, the answer is -3/70
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