Subtract 30/35 from 70/84
70/84 - 30/35 is -1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
30/35 = 30 × 12/35 × 12 = 360/420 - Subtract the two like fractions:
350/420 - 360/420 = 350 - 360/420 = -10/420 - After reducing the fraction, the answer is -1/42
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