Subtract 18/21 from 3/36
3/36 - 18/21 is -65/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
3/36 = 3 × 7/36 × 7 = 21/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
18/21 = 18 × 12/21 × 12 = 216/252 - Subtract the two like fractions:
21/252 - 216/252 = 21 - 216/252 = -195/252 - After reducing the fraction, the answer is -65/84
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