Subtract 18/54 from 81/30
1st number: 2 21/30, 2nd number: 18/54
81/30 - 18/54 is 71/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
81/30 = 81 × 9/30 × 9 = 729/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
18/54 = 18 × 5/54 × 5 = 90/270 - Subtract the two like fractions:
729/270 - 90/270 = 729 - 90/270 = 639/270 - After reducing the fraction, the answer is 71/30
- In mixed form: 211/30
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