Subtract 7/4 from 30/81
1st number: 30/81, 2nd number: 1 3/4
30/81 - 7/4 is -149/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 4 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
30/81 = 30 × 4/81 × 4 = 120/324 - Likewise, for the 2nd fraction, since 4 × 81 = 324,
7/4 = 7 × 81/4 × 81 = 567/324 - Subtract the two like fractions:
120/324 - 567/324 = 120 - 567/324 = -447/324 - After reducing the fraction, the answer is -149/108
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