Multiply $279$ and $88888888889$ to get $24800000000031$.
$$\frac{8}{24800000000031}\times 8-0.125$$
Express $\frac{8}{24800000000031}\times 8$ as a single fraction.
$$\frac{8\times 8}{24800000000031}-0.125$$
Multiply $8$ and $8$ to get $64$.
$$\frac{64}{24800000000031}-0.125$$
Convert decimal number $0.125$ to fraction $\frac{125}{1000}$. Reduce the fraction $\frac{125}{1000}$ to lowest terms by extracting and canceling out $125$.
$$\frac{64}{24800000000031}-\frac{1}{8}$$
Least common multiple of $24800000000031$ and $8$ is $198400000000248$. Convert $\frac{64}{24800000000031}$ and $\frac{1}{8}$ to fractions with denominator $198400000000248$.
Since $\frac{512}{198400000000248}$ and $\frac{24800000000031}{198400000000248}$ have the same denominator, subtract them by subtracting their numerators.
$$\frac{512-24800000000031}{198400000000248}$$
Subtract $24800000000031$ from $512$ to get $-24799999999519$.
