Subtract 30/32 from 15/42
15/42 - 30/32 is -65/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 42 × 16 = 672,
15/42 = 15 × 16/42 × 16 = 240/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
30/32 = 30 × 21/32 × 21 = 630/672 - Subtract the two like fractions:
240/672 - 630/672 = 240 - 630/672 = -390/672 - After reducing the fraction, the answer is -65/112
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