[Solved] How to make a chance system?

This inserts the pets chance into a table where it will get a random one. The chance is the number next to the pets name (Code Block 2 for the module/pets)

local canGetPets = {}

local rar = eggModule[egg].Rarities
for currentPlace = 1,#rar do
    local mathmatical = math.max(rar[currentPlace][2])
    for i = 1,mathmatical do
                table.insert(canGetPets, rar[currentPlace][1])
    end
end

(Egg module script with pets and their chance)

local eggs = {

    ["Basic Egg"] = {
        Cost = {"Cash", 0};
        Rarities = {
            {"Dog", 55};
            {"Cat", 45};
            {"Bear", 30};
            {"Wolf", 15};
            {"Vespertillius", 0.002};
        }
    };


}

return eggs

The problem is is that it can't insert 0.002 of a pet into a table (obviously) I just don't know how else to do it.