Final answer:
To determine how many tables have guests seated at them, multiply the total number of tables, which is 18, by 5/6. The calculation yields 15, meaning there are 15 tables with guests at the restaurant.
Step-by-step explanation:
The question presented is concerned with the number of tables that have guests seated at them at a restaurant, based on a certain fraction of the total tables. To find the answer, we need to know the fraction of tables that have guests and the total number of tables.
Given that the restaurant has 18 tables, and 55 guests are dining at ⅖ of the tables, we can calculate the number of tables that have guests by multiplying the total number of tables by the fraction mentioned which is ⅖:
Number of tables with guests = total tables × fraction of tables with guests
= 18 tables × ⅖
= 18 × 5 ÷ 6
= 15 tables