Subtract 42/15 from 40/70
1st number: 40/70, 2nd number: 2 12/15
40/70 - 42/15 is -78/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
42/15 = 42 × 14/15 × 14 = 588/210 - Subtract the two like fractions:
120/210 - 588/210 = 120 - 588/210 = -468/210 - After reducing the fraction, the answer is -78/35
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