Subtract 20/5 from 81/2
1st number: 40 1/2, 2nd number: 4 0/5
81/2 - 20/5 is 73/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
81/2 = 81 × 5/2 × 5 = 405/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
20/5 = 20 × 2/5 × 2 = 40/10 - Subtract the two like fractions:
405/10 - 40/10 = 405 - 40/10 = 365/10 - After reducing the fraction, the answer is 73/2
- In mixed form: 361/2
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