Subtract 42/70 from 9/18
9/18 - 42/70 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
9/18 = 9 × 35/18 × 35 = 315/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Subtract the two like fractions:
315/630 - 378/630 = 315 - 378/630 = -63/630 - After reducing the fraction, the answer is -1/10
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