Subtract 21/9 from 45/54
1st number: 45/54, 2nd number: 2 3/9
45/54 - 21/9 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 9 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
45/54 = 45 × 1/54 × 1 = 45/54 - Likewise, for the 2nd fraction, since 9 × 6 = 54,
21/9 = 21 × 6/9 × 6 = 126/54 - Subtract the two like fractions:
45/54 - 126/54 = 45 - 126/54 = -81/54 - After reducing the fraction, the answer is -3/2
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