How to get percent values of number

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#1

I want to know how to get like 12% of 234243 for example but

print(12 % 234243)

does not work

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#2

% is the modulus operator. You wouldn’t need that for this problem. To get 12% of a number you can just multiply it by 0.12

print(234243 * 0.12)
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#3

So if I had a table like this?


local Table = {
	Low = {
		Object = 1
	},
	Medium = {
		Object2 = 2
	},
	High = {
		Object3 = 3
	}
}

How would I make it a 25 percent chance to pick low object value?

How would I make it a 50 percent chance to pick medium object value?

How would I make it a 75 percent chance to pick high object value?

#4

As @Blokav said you need to use the multiplier operator “*” not the modulus operator. To get the percentage of a number you need to multiply it by a decimal point between .01 or 1% or .99 or 99%.

#5

I dont really understand what does modul=us even mean?

#6

Modulus is to find the remainder of a number being divided by another number. For example, if I wanted to find all the numbers with positive square roots I would do “n % 2 == 0” Then I would print “n”. It can be more complex than that but if you’re using it for basic operations then that’s how you would most likely use it.

1 Like
#7

Not sure what you mean, but for random chances use math.random. Math.random picks a random number from x-y (x and y are self set variables - you get to choose what number they are).

#8

Like @Paradigmed mentioned, the % sign in Lua and many other languages does not represent percentage.

So, you could do something like this:

local valueLanded = math.random(1, 150)

if valueLanded <= 25 then
    -- Pick Low
elseif valueLanded > 25 and <= 100 then
    -- Pick Medium
elseif valueLanded > 100 and <= 150 then
    -- Pick High
end

You can think of math.random(1, 150) as the values representing percentages. Now, you said that you want it there to be 25% chance, 50% chance, and 75% chance, but that’s impossible with a typical 0% - 100% range. You would have to scale down all of those percentages to where it adds up to 100. Currently, when you add 25, 50, and 75 percent the range becomes 0% - 150%, which is why I made it that way in the code.

So if you’d like to do it the more “correct looking” way, then simply change your chances to add up to 100%, and then chance the code accordingly.

Hope I helped!

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#9

Here is some code I wrote for someone else for something similar. This picks a value from the table based on the percent value it has. Obviously, you should probably rename some stuff.

local pets = {
	["Dog"] = 25.5,
	["Cat"] = 24.5,
	["Bird"] = 50
}
local function pickAPet()
	--Picks a number
	local num = (math.random(0,10000)) / 100
	--Variable Used in Loop
	local sum = 0
	--Loop runs though the pets and their percents
	for pet, percent in pairs(pets) do
		
		--Adds the current pet's percent to the sum
		sum = sum + percent
		--If the num is less than the sum the num was in the range of the percent
		if num < sum then
			--returns the pet(in string(word) form). Ex. math.random returns a number.
			return pet
		end
	end
	--If your percents add to less than 100 there is a chance no pet will be found. Can be set to a default pet just in case(ex. "Dog") 
	return "nopet"
end

This function returns the key name of the table element randomly based on the value the table element has.

#10

this worked well ngl thank you!