Subtract 70/84 from 10/20
10/20 - 70/84 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
10/20 = 10 × 21/20 × 21 = 210/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Subtract the two like fractions:
210/420 - 350/420 = 210 - 350/420 = -140/420 - After reducing the fraction, the answer is -1/3
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