It is given to us that the interest rate is 2%.
We know that 2% can be rewritten as [tex]\frac{2}{100}[/tex]. Now, we also know that in decimal form, [tex]\frac{2}{100}=0.02[/tex].
Therefore, the interest earned on d dollars at an interest rate of 2% will be "2% of d" which can be rewritten as[tex]0.02 \times d=0.02d[/tex]. This is because in math, "of" means the same as multiplication.
Thus, out of the given options, the last option is the correct option.
