Subtract 90/81 from 45/25
1st number: 1 20/25, 2nd number: 1 9/81
45/25 - 90/81 is 31/45.
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,
45/25 = 45 × 81/25 × 81 = 3645/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
90/81 = 90 × 25/81 × 25 = 2250/2025 - Subtract the two like fractions:
3645/2025 - 2250/2025 = 3645 - 2250/2025 = 1395/2025 - After reducing the fraction, the answer is 31/45
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