1. The problem is to find the result of the subtraction $0.45 - 0.38$. 2. Subtraction of decimals involves subtracting the digits in each place value starting from the right (hundredths place). 3. Align the numbers by the decimal point: $$\begin{array}{r} 0.45 \\ -0.38 \\ \hline \end{array}$$ 4. Subtract the hundredths place: $5 - 8$ is not possible without borrowing, so borrow 1 from the tenths place. 5. After borrowing, the tenths place becomes $3$ and the hundredths place becomes $15$. 6. Now subtract hundredths: $15 - 8 = 7$. 7. Subtract tenths: $3 - 3 = 0$. 8. Subtract units: $0 - 0 = 0$. 9. The result is $0.07$. 10. Therefore, $0.45 - 0.38 = 0.07$.