Solve Fraction Division: 9/10 Divided by 2

To solve the problem of dividing $\frac{9}{10}$ by 2, follow these steps:

• Step 1: Identify the reciprocal of the whole number 2. The reciprocal of 2 is $\frac{1}{2}$.
• Step 2: Convert the division problem into a multiplication problem using the reciprocal: $\frac{9}{10} \div 2 = \frac{9}{10} \times \frac{1}{2}$.
• Step 3: Perform the multiplication: Multiply the numerators and the denominators.
• Calculation: $\frac{9 \times 1}{10 \times 2} = \frac{9}{20}$.
• Step 4: Simplify the fraction if necessary. In this case, $\frac{9}{20}$ is already in its simplest form.

Therefore, the solution to the problem is $\frac{9}{20}$.

Upon reviewing the provided choices, we identify that choice 4: $\frac{9}{20}$ is correct.