Final answer:
Margaret can invite a maximum of 103 guests to the reception and stay under budget.
Step-by-step explanation:
To find out how many guests Margaret can invite while staying under budget, we need to subtract the amount she has already spent from her budget first. So, we have $5,323 - $2,748 = $2,575 left to spend. Next, we can find the maximum number of guests by dividing the remaining budget by the meal price per guest:
$2,575 รท $25 = 103 guests
Therefore, Margaret can invite a maximum of 103 guests to the reception and stay under budget.