Subtract 20/32 from 7/18
7/18 - 20/32 is -17/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 32 is 288
Next, find the equivalent fraction of both fractional numbers with denominator 288 - For the 1st fraction, since 18 × 16 = 288,
7/18 = 7 × 16/18 × 16 = 112/288 - Likewise, for the 2nd fraction, since 32 × 9 = 288,
20/32 = 20 × 9/32 × 9 = 180/288 - Subtract the two like fractions:
112/288 - 180/288 = 112 - 180/288 = -68/288 - After reducing the fraction, the answer is -17/72
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