Subtract 28/35 from 15/42
15/42 - 28/35 is -31/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
28/35 = 28 × 6/35 × 6 = 168/210 - Subtract the two like fractions:
75/210 - 168/210 = 75 - 168/210 = -93/210 - After reducing the fraction, the answer is -31/70
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