Subtract 20/35 from 7/18
7/18 - 20/35 is -23/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 35 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
7/18 = 7 × 35/18 × 35 = 245/630 - Likewise, for the 2nd fraction, since 35 × 18 = 630,
20/35 = 20 × 18/35 × 18 = 360/630 - Subtract the two like fractions:
245/630 - 360/630 = 245 - 360/630 = -115/630 - After reducing the fraction, the answer is -23/126
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