Cannot put measure correctly as a percentage

[Anonymous]

Dear,

I have an issue which i need help with.

I have the following visual which shows the new incoming orders during the working hours. 

Works great and is a result of a massive DAX formula

Now i would like to have it show in percentage of the total but when i do that it give the following:

So thats no where near the 100%, hopefully you can assist. 

I'll drop a screenshot of the dataset and the formula. 

Nieuwe lijnen picking =

var _cur =

SUM(Plakken[Lijnen Gedaan Picking])+SUM(Plakken[Lijnen Openstaand Picking]) //current time's value

var _prevTime = CALCULATE(MAX(Plakken[Meting Van]),ALL(Plakken[Meting Van]),'Plakken'[Meting Van]<MAX(Plakken[Meting Van])) //previous time

var _prev = CALCULATE(SUM(Plakken[Lijnen Gedaan Picking]),ALL(Plakken[Meting Van]),'Plakken'[Meting Van]=_prevTime) + CALCULATE(SUM('Plakken'[Lijnen Openstaand Picking]),ALL(Plakken[Meting Van]),'Plakken'[Meting Van]=_prevTime) //previous time's values

return

_cur-_prev