Slider widget percentage comparison

How would I be able to compare the percentage of the event.value of local function sliderListener( event ) and local function sliderListener1( event ) and display an image based on which value is higher? 

display.setStatusBar(display.HiddenStatusBar)

local widget = require(“widget”)

local composer = require(“composer”)

local scene = composer.newScene()

local background

local title

local aBtn

local pBtn

local xMid = display.contentWidth / 2

local yMid = display.contentHeight / 2

local percTxt

local percTxt1

local cell

function scene:create(event)

local sceneGroup = self.view

background = display.newImage(“plants.psd”)

background.x = display.contentWidth/2

background.y = display.contentHeight/2

sceneGroup: insert(background)

cell = display.newImage(“flaccid.png”)

cell.x = display.contentWidth/2

cell.y = 200

sceneGroup: insert(cell)

aBtn = widget.newButton{

        defaultFile=“button.png”,

        width = 274,

        height = 172

    }

    aBtn.x = 137

    aBtn.y = 1248

aBtn: addEventListener( “touch”, touchListener)

sceneGroup: insert(aBtn)

pBtn = widget.newButton{

width = 274,

        height = 172

}

pBtn.x = 613

pBtn.y = 1248

pBtn: addEventListener( “touch”, touchListener)

sceneGroup: insert(pBtn)

percTxt = display.newText(“Cell concentration: 0%”, 200, 1137, 350, 300, native.systemFont, 30)

percTxt.text = “Cell concentration: 0%”

sceneGroup: insert(percTxt)

percTxt1 = display.newText(“Solution concentration: 0%”, 622, 1100, 300, 300, native.systemFont, 30)

percTxt1.text = “Solution concentration: 0%”

sceneGroup: insert(percTxt1)

local function sliderListener( event )

    percTxt.text = "Cell concentration: " … event.value … “%”

end

local function sliderListener1( event )

    percTxt1.text = "Solution concentration: " … event.value … “%”

end

local compare ()

if 

local slider = widget.newSlider(

    {

        x = 160,

        y = 1050,

        width = 250,

        value = 0,  

        listener = sliderListener

    }

)

sceneGroup: insert(slider)

local slider1 = widget.newSlider(

    {

        x = 610,

        y = 1050,

        width = 250,

        value = 0,  

        listener = sliderListener1

    }

)

sceneGroup: insert(slider1)

end

function touchListener(event)

if (event.target == aBtn and event.phase == “began”) then

composer.gotoScene(“animals”)

end

if (event.target == pBtn and event.phase == “began”) then

composer.gotoScene(“plants”)

return true

end

end

function scene:show (event)

end

function scene:destroy(event)

local sceneGroup = self.view

composer.removeScene(“plants”, true)

sceneGroup = nil

end

function scene:hide(event)

end

scene: addEventListener( “create”, scene )

scene: addEventListener( “show”, scene )

scene: addEventListener( “hide”, scene )

scene: addEventListener( “destroy”, scene )

return scene