To subtract \(4.66 \times 10^{-5}\) and \(7.34 \times 10^{-7}\), we first need to express both numbers with the same exponent.
The first number is \(4.66 \times 10^{-5}\), which can be rewritten as:
\[ 4.66 \times 10^{-5} = 4.66 \times 10^{-5} \times \frac{100}{100} = 4.66 \times 10^{-5} = 4.66 \times 10^{-5} = 4.66 \times 10^{-5} \]
The second number \(7.34 \times 10^{-7}\) can also be expressed with an exponent of \(-5\):
\[ 7.34 \times 10^{-7} = 0.0734 \times 10^{-5} \]
Now we can rewrite the original problem as:
\[ 4.66 \times 10^{-5} - 0.0734 \times 10^{-5} \]
Performing the subtraction:
\[ 4.66 - 0.0734 = 4.5866 \]
Then we express this back in scientific notation:
\[ 4.5866 \times 10^{-5} \]
Thus, the answer to \(4.66 \times 10^{-5} - 7.34 \times 10^{-7}\) is:
\[ \boxed{4.5866 \times 10^{-5}} \]