Subtract 16/42 from 81/2
1st number: 40 1/2, 2nd number: 16/42
81/2 - 16/42 is 1685/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
81/2 = 81 × 21/2 × 21 = 1701/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
16/42 = 16 × 1/42 × 1 = 16/42 - Subtract the two like fractions:
1701/42 - 16/42 = 1701 - 16/42 = 1685/42 - In mixed form: 405/42
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