ALT Maintaining a consistent width-to-height ratio, called an aspect ratio, is critical in responsive web design and for preventing cumulative layout shift. Now, there's a more straightforward way to do this with the new aspect-ratio property. Aspect ratio is most commonly expressed as two integers and a colon in the dimensions of: width:height, or x:y. The most common aspect ratios for photography are 4:3 and 3:2, while video, and more recent consumer cameras, tend to have a 16:9 aspect ratio. Unfortunately, calculating these padding-top values is not very intuitive, and requires some additional overhead and positioning. With the new intrinsic aspect-ratio CSS property, the language for maintaining aspect ratios is much more clear. With the same markup, we can replace: padding-top: 56.25% with aspect-ratio: 16 / 9, setting aspect-ratio to a specified ratio of width / height.