I have a rule of three in regards to image ratio that I am trying to achive.

I have an image of 800x532. That is a ratio of 1.5.

The standard ratio I need to obtain is 0.83.

So, as the width is greater than the height on that image, I need to lower the width until it would match the 0.83 ratio.

Basically, it would be 442.

I am trying to find the proper mathematical routine here.

Anyone would be able to see it right away?