Subtract 84/45 from 15/18
1st number: 15/18, 2nd number: 1 39/45
15/18 - 84/45 is -31/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
84/45 = 84 × 2/45 × 2 = 168/90 - Subtract the two like fractions:
75/90 - 168/90 = 75 - 168/90 = -93/90 - After reducing the fraction, the answer is -31/30
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