Subtract 45/10 from 42/80
1st number: 42/80, 2nd number: 4 5/10
42/80 - 45/10 is -159/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
45/10 = 45 × 8/10 × 8 = 360/80 - Subtract the two like fractions:
42/80 - 360/80 = 42 - 360/80 = -318/80 - After reducing the fraction, the answer is -159/40
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