Subtract 4/80 from 81/2
1st number: 40 1/2, 2nd number: 4/80
81/2 - 4/80 is 809/20.
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,
81/2 = 81 × 40/2 × 40 = 3240/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Subtract the two like fractions:
3240/80 - 4/80 = 3240 - 4/80 = 3236/80 - After reducing the fraction, the answer is 809/20
- In mixed form: 409/20
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