Subtract 20/9 from 45/30
1st number: 1 15/30, 2nd number: 2 2/9
45/30 - 20/9 is -13/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
45/30 = 45 × 3/30 × 3 = 135/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
20/9 = 20 × 10/9 × 10 = 200/90 - Subtract the two like fractions:
135/90 - 200/90 = 135 - 200/90 = -65/90 - After reducing the fraction, the answer is -13/18
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