How to add latitude to the coordinate?

[Mikeeeeee]

Hi!
How to add latitude to the coordinate?
I get the coordinate like this:

visibleRegion.boundingGeoRectangle().topLeft

How to add to coordinate

visibleRegion.boundingGeoRectangle().width / 100

[Mikeeeeee]

it is not work

                a = visibleRegion.boundingGeoRectangle().topLeft
                a.setLatitude(a.latitude + visibleRegion.boundingGeoRectangle().width )

[Mikeeeeee]

it is work:

                console.log("широта     :" + visibleRegion.boundingGeoRectangle().topLeft.latitude)
                var a = visibleRegion.boundingGeoRectangle().topLeft
                a.latitude = 56

                console.log("широта + 1 :" + a)