Percentage of users more likely to purchase on mobile friendly site.
Most of the world accesses the internet on multiple devices.
Percentage of users that are frustrated with page load times.
Skeleton Framework is an amazingly easy place to start with responsive development. If you want to learn more, just visit the documentation!View Skeleton Framework Docs
Skeleton Framework images sit easily in grid with .u-max-full-width class. I suggest exploring solution to serving different images based on device size.