Subtract 20/40 from 4/9
4/9 - 20/40 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
4/9 = 4 × 40/9 × 40 = 160/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
20/40 = 20 × 9/40 × 9 = 180/360 - Subtract the two like fractions:
160/360 - 180/360 = 160 - 180/360 = -20/360 - After reducing the fraction, the answer is -1/18
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