Subtract 80/42 from 12/15
1st number: 12/15, 2nd number: 1 38/42
12/15 - 80/42 is -116/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
12/15 = 12 × 14/15 × 14 = 168/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
168/210 - 400/210 = 168 - 400/210 = -232/210 - After reducing the fraction, the answer is -116/105
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