To solve this problem, let's start with the given equation: \[ 20\% \text{ of } x = y \] This can be written as: \[ 0.2x = y \] Now, we need to find \( y\% \text{ of } 20 \). This can be expressed as: \[ \frac{y}{100} \times 20 \] Substitute \( y = 0.2x \) into the equation: \[ \frac{0.2x}{100} \times 20 \] Simplify the expression: \[ \frac{0.2x \times 20}{100} = \frac{4x}{100} = 0.04x \] So, \( y\% \text{ of } 20 \) is the same as: Answer: D (4% of x)