Final answer:
You can afford to spend $180 on new equipment, which is the amount remaining after reserving 20% of the $225 in your account.
Step-by-step explanation:
The question involves a mathematical calculation of percentages. If you have $225 in your account and need to keep 20% of that amount untouched, we firstly need to calculate what 20% of $225 is.
To find 20% of a number, you can multiply the number by 0.20. So, 20% of $225 is $225 × 0.20, which equals $45. This $45 represents the amount you need to leave in your account.
Next, we subtract the $45 from the total $225 to see how much you can afford to spend.
Therefore, the most you could afford to spend would be $225 - $45, which is $180. This is the maximum amount you would be able to spend on new equipment without going below the 20% threshold you want to maintain in your account.