Subtract 8/10 from 12/42
12/42 - 8/10 is -18/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
8/10 = 8 × 21/10 × 21 = 168/210 - Subtract the two like fractions:
60/210 - 168/210 = 60 - 168/210 = -108/210 - After reducing the fraction, the answer is -18/35
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