Write the decimal as a fraction:
Example: (0.25 = frac{25}{100})
Place the decimal digits over a power of 10:
If there are (n) decimal places, use (10^n) in the denominator
Simplify the fraction by dividing numerator and denominator by their greatest common divisor
For repeating decimals:
Let (x) equal the repeating decimal
Multiply by (10^n) where (n) is the length of the repeating block
Subtract to eliminate the repeating part
Simplify the resulting fraction