Subtract 2/4 from 20/45
20/45 - 2/4 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
2/4 = 2 × 45/4 × 45 = 90/180 - Subtract the two like fractions:
80/180 - 90/180 = 80 - 90/180 = -10/180 - After reducing the fraction, the answer is -1/18
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