1. The problem asks to find the total number of tourists in a group if 13500 tourists represent 12% of that group. 2. Let $x$ be the total number of tourists in the group. 3. Since 13500 is 12% of $x$, we write the equation $$13500 = 0.12x$$ 4. To find $x$, divide both sides by 0.12: $$x = \frac{13500}{0.12}$$ 5. Calculate the division: $$x = 112500$$ 6. Therefore, the total number of tourists in the entire group is $112500$ tourists.