Subtract 42/81 from 7/4
1st number: 1 3/4, 2nd number: 42/81
7/4 - 42/81 is 133/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
7/4 = 7 × 81/4 × 81 = 567/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
42/81 = 42 × 4/81 × 4 = 168/324 - Subtract the two like fractions:
567/324 - 168/324 = 567 - 168/324 = 399/324 - After reducing the fraction, the answer is 133/108
- In mixed form: 125/108
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