For every 2 pokeballs, you will catch a Squirtle
2 : 1
Now,let's imagine we want to catch the double of Squirtles
We'll need 4 pokeballs to catch 2 Squirtles
4 : 2
Now, if we wanted to catch 3 Squirtles, we'll need the triple of pokeballs,
The triple of 2 is 6
Therefore, for every 6 pokeballs you throw, you'll catch 3 Squirtles
6 : 3
In conclusion, the ratios 2:1 and 6:3 are equivalents because they are proportional. We can say also that...