Subtract 80/42 from 15/70
1st number: 15/70, 2nd number: 1 38/42
15/70 - 80/42 is -71/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
15/70 = 15 × 3/70 × 3 = 45/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
45/210 - 400/210 = 45 - 400/210 = -355/210 - After reducing the fraction, the answer is -71/42
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