We have covered 55% of the route, and we have 18 km to go. How long is this route?

1. Since we know from the data presented in the problem statement that we have already covered 55% of the route length, therefore we can calculate how many percent of the route remains to be covered, because the entire route is 100%.

100 – 55 = 45%.

2. And now let’s calculate what the length of this entire route is equal to, because we also know that the remaining 45% of the path is 18 km, then we write:

18 km – 45%;

x km – 100.

x * 45 = 18 * 100;

x * 45 = 1800;

x = 1800/45;

x = 40 km.

Answer: The length of the route is 40 km.