Subtract 7/81 from 25/20
1st number: 1 5/20, 2nd number: 7/81
25/20 - 7/81 is 377/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
25/20 = 25 × 81/20 × 81 = 2025/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
7/81 = 7 × 20/81 × 20 = 140/1620 - Subtract the two like fractions:
2025/1620 - 140/1620 = 2025 - 140/1620 = 1885/1620 - After reducing the fraction, the answer is 377/324
- In mixed form: 153/324
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