Subtract 54/84 from 42/70
42/70 - 54/84 is -3/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
42/70 = 42 × 6/70 × 6 = 252/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
54/84 = 54 × 5/84 × 5 = 270/420 - Subtract the two like fractions:
252/420 - 270/420 = 252 - 270/420 = -18/420 - After reducing the fraction, the answer is -3/70
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Related: 84/70-54/84