How can I increase the size of a CGRect by a certain percent value?

Question

How can I increase the size of a CGRect by a certain percent value? Should I use some form of CGRectInset to do it?

Example:

Assume I have a CGRect:

Answer 1

let scale = percent / 100
let newRect = oldRect.applying(CGAffineTransform(scaleX: scale, y: scale))

Beware that this approach also will change x and y of rectangle.