What percentage of the entire invoice of $9,600 is represented by the first payment?

To determine what percentage of the entire invoice of $9,600 is represented by the first payment, you need to know the amount of the first payment. Once you have that amount, you can calculate the percentage by using the formula:

Percentage = (Part / Whole) × 100

In this case, the "Whole" is the total invoice amount of $9,600. If the first payment is represented as a specific dollar amount, you would divide that dollar amount by $9,600 and then multiply by 100 to convert it into a percentage.

Assuming the first payment is $3,840 (which is 40% of $9,600), you would calculate it as follows:

Percentage = ($3,840 / $9,600) × 100

= 0.4 × 100

= 40%

This shows that the first payment represents 40% of the entire invoice amount. Thus, if the first payment was $3,840, the correct choice is that it accounts for 40% of the invoice total.