Subtract 12/81 from 90/75
1st number: 1 15/75, 2nd number: 12/81
90/75 - 12/81 is 142/135.
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,
90/75 = 90 × 27/75 × 27 = 2430/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
12/81 = 12 × 25/81 × 25 = 300/2025 - Subtract the two like fractions:
2430/2025 - 300/2025 = 2430 - 300/2025 = 2130/2025 - After reducing the fraction, the answer is 142/135
- In mixed form: 17/135
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