Express the percent as a decimal. \[ 64 \frac{1}{2} \% \] \[ 64 \frac{1}{2} \%=\square \] (Type an integer or a decimal.)

Step 1 ：Express the percent as a decimal: \(64 \frac{1}{2} \%\)

Step 2 ：Convert the mixed number to an improper fraction: \(\frac{129}{2}\)

Step 3 ：Divide the fraction by 100 to get the decimal: \(\frac{129}{2} \div 100 = 0.645\)

Step 4 ：Final Answer: \(64 \frac{1}{2} \% = \boxed{0.645}\)