Solve the Decimal Subtraction: 24.2 - 3.7

$24.2-3.7=$

To solve the problem $24.2 - 3.7$, follow these detailed steps:

• Step 1: Align the numbers by their decimal points:
  $\begin{array}{r} 24.2 \\ -3.7 \\ \hline \end{array}$
• Step 2: Subtract the digits from the rightmost side. Starting with the tenths place, $2 - 7$ cannot be done without borrowing. Borrow 1 from the number in the units place (4 becomes 3), making it $12 - 7 = 5$.
• Step 3: Proceed to the whole number place. After borrowing, subtract $3 - 3 = 0$.
• Step 4: Move to the tens place, subtract $2 - 0 = 2$.

Therefore, the result of the subtraction $24.2 - 3.7$ is $20.5$.