To express the repeating decimal \(0.154154154...\) as a fraction, we can use the notation for repeating decimals.
Let's denote the repeating decimal as: \[ x = 0.154154154... \]
Now, observe that the repeating part "154" has three digits. To eliminate the repeating decimal, we can multiply \(x\) by \(1000\) (since "154" consists of three digits): \[ 1000x = 154.154154154... \]
Next, we can set up an equation by subtracting the original \(x\) from this equation: \[ 1000x - x = 154.154154154... - 0.154154154... \] This simplifies to: \[ 999x = 154 \]
Now, we can solve for \(x\): \[ x = \frac{154}{999} \]
Thus, the infinite decimal expansion \(0.154154154...\) as a fraction is: \[ \frac{154}{999} \]