Subtract 9/25 from 81/21
1st number: 3 18/21, 2nd number: 9/25
81/21 - 9/25 is 612/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
81/21 = 81 × 25/21 × 25 = 2025/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
9/25 = 9 × 21/25 × 21 = 189/525 - Subtract the two like fractions:
2025/525 - 189/525 = 2025 - 189/525 = 1836/525 - After reducing the fraction, the answer is 612/175
- In mixed form: 387/175
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