Subtract 90/12 from 75/81
1st number: 75/81, 2nd number: 7 6/12
75/81 - 90/12 is -355/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
75/81 = 75 × 4/81 × 4 = 300/324 - Likewise, for the 2nd fraction, since 12 × 27 = 324,
90/12 = 90 × 27/12 × 27 = 2430/324 - Subtract the two like fractions:
300/324 - 2430/324 = 300 - 2430/324 = -2130/324 - After reducing the fraction, the answer is -355/54
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