Subtract 45/18 from 12/20
1st number: 12/20, 2nd number: 2 9/18
12/20 - 45/18 is -19/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
45/18 = 45 × 10/18 × 10 = 450/180 - Subtract the two like fractions:
108/180 - 450/180 = 108 - 450/180 = -342/180 - After reducing the fraction, the answer is -19/10
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