Subtract 98/40 from 42/80
1st number: 42/80, 2nd number: 2 18/40
42/80 - 98/40 is -77/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 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 40 × 2 = 80,
98/40 = 98 × 2/40 × 2 = 196/80 - Subtract the two like fractions:
42/80 - 196/80 = 42 - 196/80 = -154/80 - After reducing the fraction, the answer is -77/40
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