Subtract 8/9 from 18/70
18/70 - 8/9 is -199/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
8/9 = 8 × 70/9 × 70 = 560/630 - Subtract the two like fractions:
162/630 - 560/630 = 162 - 560/630 = -398/630 - After reducing the fraction, the answer is -199/315
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