Subtract 12/81 from 45/20
1st number: 2 5/20, 2nd number: 12/81
45/20 - 12/81 is 227/108.
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,
45/20 = 45 × 81/20 × 81 = 3645/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
12/81 = 12 × 20/81 × 20 = 240/1620 - Subtract the two like fractions:
3645/1620 - 240/1620 = 3645 - 240/1620 = 3405/1620 - After reducing the fraction, the answer is 227/108
- In mixed form: 211/108
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