Subtract 15/81 from 90/25
1st number: 3 15/25, 2nd number: 15/81
90/25 - 15/81 is 461/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 25 × 81 = 2025,
90/25 = 90 × 81/25 × 81 = 7290/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
15/81 = 15 × 25/81 × 25 = 375/2025 - Subtract the two like fractions:
7290/2025 - 375/2025 = 7290 - 375/2025 = 6915/2025 - After reducing the fraction, the answer is 461/135
- In mixed form: 356/135
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