Calculator in spreadsheet?

[rokunation]

Hi looking to build a spreadsheet where we would enter two different percentage totalling 85% of a set total. So as the percentage change the two numbers adding up to the total changes with the percentage. Does that make sense?

I want to kinda have two slider percentages equaling 85% and it shows the number of a set total.

 

[rokunation]

 

[rokunation]

Similar to this example however need it for two percentages. For example 60% and 25% of an original amount