Subtract 20/40 from 15/36
15/36 - 20/40 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
15/36 = 15 × 10/36 × 10 = 150/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
20/40 = 20 × 9/40 × 9 = 180/360 - Subtract the two like fractions:
150/360 - 180/360 = 150 - 180/360 = -30/360 - After reducing the fraction, the answer is -1/12
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