Subtract 42/80 from 1/2
1/2 - 42/80 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
1/2 = 1 × 40/2 × 40 = 40/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Subtract the two like fractions:
40/80 - 42/80 = 40 - 42/80 = -2/80 - After reducing the fraction, the answer is -1/40
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