Calculating new width and height with maintaining aspect ratio of Image in iOS

Image original width = 100 and height = 150

Container width  = 200 and height = 200

x-ratio = Container width / Image original width = 200/100 = 2.0

y-ratio =  Container height / Image original height = 200/ 150 =  1.33

Selected ratio = min (x-ratio, y-ratio) = 1.33

Final Image width = Image original width * Selected Ratio = 100 * 1.33 = 133

Final Image height = Image original height * Selected Ratio = 150 * 1.33 = 200

Final Image width x height = 133 x 200 (Original width x height of image was 100 x 150)

float leftOffset = (Container width - finalImageWidth) / 2;

float topOffset = (Container width - finalImageHeight) / 2;

[self.imageView setFrame:CGRectMake(leftOffset,topOffset, finalImageWidth, finalImageHeight)];

[self.imageView setImage:@"image name"];

self.imageView.contentMode = UIViewContentModeScaleAspectFit;