Subtract 30/7 from 45/81
1st number: 45/81, 2nd number: 4 2/7
45/81 - 30/7 is -235/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
45/81 = 45 × 7/81 × 7 = 315/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
30/7 = 30 × 81/7 × 81 = 2430/567 - Subtract the two like fractions:
315/567 - 2430/567 = 315 - 2430/567 = -2115/567 - After reducing the fraction, the answer is -235/63
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