Subtract 18/81 from 45/20
1st number: 2 5/20, 2nd number: 18/81
45/20 - 18/81 is 73/36.
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,
18/81 = 18 × 20/81 × 20 = 360/1620 - Subtract the two like fractions:
3645/1620 - 360/1620 = 3645 - 360/1620 = 3285/1620 - After reducing the fraction, the answer is 73/36
- In mixed form: 21/36
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