Step 1: Identify the number of decimal places

The decimal 19.455 has 3 decimal places.

Step 2: Multiply by the appropriate power of 10

Multiply by 10³ = 1000 to eliminate the decimal point.

19.455 × 1000 = 19455

Step 3: Write as a fraction

Step 4: Simplify the fraction

Find the greatest common divisor (GCD) of 19455 and 1000.

GCD(19455, 1000) = 5

Divide both the numerator and denominator by the GCD: