Subtract 18/42 from 9/36
9/36 - 18/42 is -5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
9/36 = 9 × 7/36 × 7 = 63/252 - Likewise, for the 2nd fraction, since 42 × 6 = 252,
18/42 = 18 × 6/42 × 6 = 108/252 - Subtract the two like fractions:
63/252 - 108/252 = 63 - 108/252 = -45/252 - After reducing the fraction, the answer is -5/28
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