Step 1: Identify the number of decimal places

The decimal 77.12 has 2 decimal places.

Step 2: Multiply by the appropriate power of 10

Multiply by 10² = 100 to eliminate the decimal point.

77.12 × 100 = 7712

Step 3: Write as a fraction

Step 4: Simplify the fraction

Find the greatest common divisor (GCD) of 7712 and 100.

GCD(7712, 100) = 4

Divide both the numerator and denominator by the GCD: