Subtract 84/81 from 40/75
1st number: 40/75, 2nd number: 1 3/81
40/75 - 84/81 is -68/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 75 × 27 = 2025,
40/75 = 40 × 27/75 × 27 = 1080/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
84/81 = 84 × 25/81 × 25 = 2100/2025 - Subtract the two like fractions:
1080/2025 - 2100/2025 = 1080 - 2100/2025 = -1020/2025 - After reducing the fraction, the answer is -68/135
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Related: 80/75-84/81