Subtract 45/42 from 12/15
1st number: 12/15, 2nd number: 1 3/42
12/15 - 45/42 is -19/70.
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,
45/42 = 45 × 5/42 × 5 = 225/210 - Subtract the two like fractions:
168/210 - 225/210 = 168 - 225/210 = -57/210 - After reducing the fraction, the answer is -19/70
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