Subtract 21/81 from 45/3
1st number: 15 0/3, 2nd number: 21/81
45/3 - 21/81 is 398/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
45/3 = 45 × 27/3 × 27 = 1215/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
21/81 = 21 × 1/81 × 1 = 21/81 - Subtract the two like fractions:
1215/81 - 21/81 = 1215 - 21/81 = 1194/81 - After reducing the fraction, the answer is 398/27
- In mixed form: 1420/27
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