Tourists walked 0.6 of the entire route, and then 0.25 of the rest. How much of the route do they have to go?

Let’s designate the entire path that tourists must go along the route in 1.
Let’s find the path that is left for the tourists to go along the route.
1 – 0.6 = 0.4 of the entire route is left for tourists to pass, after they have covered 0.6 of the entire route.
Find 0.25 of the remaining path of the route:
0.4 * 0.25 = 0.1 of the entire route.
Now we will find how much is left for tourists to pass along the route.
0.4 – 0.1 = 0.3 route.
Answer: 0.3 of the whole route.