Subtract 4/10 from 12/84
12/84 - 4/10 is -9/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
4/10 = 4 × 42/10 × 42 = 168/420 - Subtract the two like fractions:
60/420 - 168/420 = 60 - 168/420 = -108/420 - After reducing the fraction, the answer is -9/35
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