The original image has a resolution of 500 x 400
The aspect ratio is 500 / 400 or 5:4
The image at half the size is 250 x 200
The image at quarter the size is 200 x 150
The original image has a resolution of 400 x 400
The aspect ratio is 400 / 400 or 4:4
The image at half the size is 200 x 200
The image at quarter the size is 100 x 100
The original image has a resolution of 400 x 400
The aspect ratio is 400 / 400 or 4:4
The image at half the size is 200 x 200
The image at quarter the size is 100 x 100