Write the following infinite decimal expansion as a fraction. You do not need to simplify.

0.154154154

3 answers

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: \[ \frac{154}{999} \]

I don't exactly understand this, what's the answer?

The repeating decimal \(0.154154154...\) can be written as the fraction \(\frac{154}{999}\).

There it is in a simple form: \[ 0.154154154... = \frac{154}{999} \]

If you need further clarification on any steps, feel free to ask!