Subtract 30/70 from 1/18, Solve 1/18

Subtract 30/70 from 1/18

1/18 - 30/70 is -47/126.

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,
1/18 = 1 × 35/18 × 35 = 35/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
30/70 = 30 × 9/70 × 9 = 270/630
Subtract the two like fractions:
35/630 - 270/630 = 35 - 270/630 = -235/630
After reducing the fraction, the answer is -47/126

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