Step 1: Identify the number of decimal places

The decimal 40.5748 has 4 decimal places.

Step 2: Multiply by the appropriate power of 10

Multiply by 10⁴ = 10000 to eliminate the decimal point.

40.5748 × 10000 = 405748

Step 3: Write as a fraction

Step 4: Simplify the fraction

Find the greatest common divisor (GCD) of 405748 and 10000.

GCD(405748, 10000) = 4

Divide both the numerator and denominator by the GCD: