How do you make damage numbers show based on the actual value instead of how much health an npc has?

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local TweenService = game:GetService("TweenService")
local HttpService = game:GetService("HttpService")

--// Modules
local Maid = require(script.Maid)

--// Assets
local uiTemplate = script.DamageTemplate

--// Objects
local random = Random.new()

local DamageIndication = {}
DamageIndication.__index = DamageIndication

function DamageIndication.new(instance)
    local self = setmetatable({}, DamageIndication)

    self._humanoid = instance:FindFirstChild("Humanoid")
    self._head = instance:FindFirstChild("Head")
    self._instance = instance

    self._maid = Maid.new()

    self:Bind()

    return self
end

--// Bind damage indicator UI to instance, called automaticlaly in constructor
function DamageIndication:Bind()
    assert(self._humanoid, "Instance does not contain a humanoid")
    assert(self._head, "Instance does not contain a humanoid root part")

    self.currentHealth = self._humanoid.Health

    self._maid:GiveTask(self._humanoid.HealthChanged:Connect(function(newHealth)
        local damage = self.currentHealth - newHealth
        self.currentHealth = newHealth

        self:SpawnUI(damage)
    end))

    self._maid:GiveTask(self._instance.AncestryChanged:Connect(function()
        if self._instance.Parent ~= game then
            self:Destroy()
        end
    end))

    self._maid:GiveTask(self._humanoid.Died:Connect(function()
        self:Destroy()
    end))
end

function DamageIndication:SpawnUI(amount)
    local indicator = uiTemplate:Clone()
    local label = indicator.Label
    local maxHealth = self._humanoid.maxHealth

    label.Text = math.floor(math.abs(amount))
    label.TextColor3 = self:GetIndicatorColor(amount, maxHealth)

    local xy = math.clamp(math.abs(amount/maxHealth), 0.6, 1.3)
    label.Size = UDim2.fromScale(xy, xy) 

    --// Randomly disperse to prevent clutter
    local x = random:NextNumber(.2, .8)
    label.Position = UDim2.fromScale(x, 0.5)

    local indicatorTween = TweenService:Create(label, TweenInfo.new(2, Enum.EasingStyle.Quint), {
        Position = UDim2.fromScale(x, -0.5),
        TextTransparency = 1
    })

    indicator.Parent = self._head
    indicatorTween:Play()

    indicatorTween.Completed:Wait()
    indicator:Destroy()
end

function DamageIndication:GetIndicatorColor(amount)
    return amount >= 0 and Color3.fromRGB(255, 255, 255)
end

function DamageIndication:Destroy()
    self._maid:Destroy()
end

--// BONUS: Automatic method that binds to all existing NPC's in your game
function DamageIndication.BindToAllNPCs()
    for _, instance in ipairs(game.Workspace:GetDescendants()) do
        if not instance:IsA("Model") then continue end
        if not instance:FindFirstChild("Humanoid") then continue end
        if not instance:FindFirstChild("Head") then continue end

        DamageIndication.new(instance)
    end
end

return DamageIndication

I want to make it so when i kill an NPC with a weapon it shows the damage value instead of a value based off the npcs health idk which line to change so i pasted the whole code but can anyone help me solve this?

This is what it looks like also btw the gun i'm using does 264k damage not 200k it's showing numbers based on how much health the dummy has unless they have a health value greater than 264k https://gyazo.com/f4bfe6a33de59910ec97bb54f72db9c4