Subtract 8/16 from 15/42
15/42 - 8/16 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
15/42 = 15 × 8/42 × 8 = 120/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
8/16 = 8 × 21/16 × 21 = 168/336 - Subtract the two like fractions:
120/336 - 168/336 = 120 - 168/336 = -48/336 - After reducing the fraction, the answer is -1/7
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