Subtract 42/70 from 1/2
1/2 - 42/70 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 2 × 35 = 70,
1/2 = 1 × 35/2 × 35 = 35/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Subtract the two like fractions:
35/70 - 42/70 = 35 - 42/70 = -7/70 - After reducing the fraction, the answer is -1/10
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