Subtract 7/20 from 81/2
1st number: 40 1/2, 2nd number: 7/20
81/2 - 7/20 is 803/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
81/2 = 81 × 10/2 × 10 = 810/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
7/20 = 7 × 1/20 × 1 = 7/20 - Subtract the two like fractions:
810/20 - 7/20 = 810 - 7/20 = 803/20 - In mixed form: 403/20
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