11. in cell c18, enter a formula without using a function that first subtracts the projected donation amount (cell c17) from the total donation amount (cell c15), and then divides the result by the projected donation amount.

=(C15-C17)/C17

Explanation: First step is to get the difference between the total donation amount and the projected donation amount. This is done as follows: (C15-C17). It was put in parentheses so that the software calculates this first before dividing.

The next is to divide the result by the projected donation amount with C17 as its cell reference. This means the input should be (C15-C17)/C17

Note: Entering the formula without the parentheses (e.g. C15-C17/C17) simply means deducting the projected amount (already divided by the projected amount) from the total donation amount