Math Problem Statement

0.18 with just the 8 repeating as a fraction

Solution

The decimal 0.1880.18\overline{8} (with the 8 repeating) can be converted to a fraction as follows:

Let x=0.188x = 0.18\overline{8}.

Step 1: Multiply by 10 to move the decimal point one place right.

10x=1.8810x = 1.8\overline{8}

Step 2: Multiply by 100 to move the decimal point two places right.

100x=18.88100x = 18.8\overline{8}

Step 3: Subtract the two equations.

Subtract 10x=1.8810x = 1.8\overline{8} from 100x=18.88100x = 18.8\overline{8}: 100x10x=18.881.88100x - 10x = 18.8\overline{8} - 1.8\overline{8} 90x=1790x = 17

Step 4: Solve for xx.

x=1790x = \frac{17}{90}

So, 0.1880.18\overline{8} as a fraction is 1790\frac{17}{90}.

Would you like further details on this process or have any questions?

Here are 5 related questions to extend this topic:

  1. How do you convert a non-repeating decimal to a fraction?
  2. How do you convert other repeating decimals to fractions, like 0.270.2\overline{7}?
  3. What is the difference between a repeating and terminating decimal?
  4. How do you simplify a fraction?
  5. How do you convert a fraction back into a decimal?

Tip: When converting repeating decimals to fractions, identifying the repeating part of the decimal early helps simplify the process.

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Math Problem Analysis

Mathematical Concepts

Repeating Decimals
Fractions
Algebra

Formulas

x = repeating decimal
Subtracting equations to eliminate repeating part
x = fraction form

Theorems

Basic Algebraic Manipulation

Suitable Grade Level

Grades 7-10