What is a quick way to solve ratios other than adding them

First 0:0 second 0/0 third 0.0

A ratio can be written in three different ways:

x to y

x:y

x/y

These all mean dividing.

For example, one package contains 20 cookies so the equation would be:

20/1 so to find how many cookies are in 2 packages you would multiply 20 by 2 which would equal 40 so the equation would equal 40/2 which means 40 cookies in 2 packages.