Subtract 18/42 from 1/72
1/72 - 18/42 is -209/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
1/72 = 1 × 7/72 × 7 = 7/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
18/42 = 18 × 12/42 × 12 = 216/504 - Subtract the two like fractions:
7/504 - 216/504 = 7 - 216/504 = -209/504
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