Subtract 40/70 from 5/42
5/42 - 40/70 is -19/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
5/42 = 5 × 5/42 × 5 = 25/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
40/70 = 40 × 3/70 × 3 = 120/210 - Subtract the two like fractions:
25/210 - 120/210 = 25 - 120/210 = -95/210 - After reducing the fraction, the answer is -19/42
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