Subtract 80/42 from 70/84
1st number: 70/84, 2nd number: 1 38/42
70/84 - 80/42 is -15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
70/84 = 70 × 1/84 × 1 = 70/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
80/42 = 80 × 2/42 × 2 = 160/84 - Subtract the two like fractions:
70/84 - 160/84 = 70 - 160/84 = -90/84 - After reducing the fraction, the answer is -15/14
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Related: 70/84-80/84