On the mobile phone side, two pictures side, the picture how to set the proportion

Today, with the MUI Carousel, I want to display two carousel graphs in a row, the width of the picture in a carousel is 500, the other one is 250, the height is the same.

A carousel diagram starts with a width of 60% and another setting of 40%, so that it can be displayed correctly. As a result, the following problem occurs

What is the reason for this, the original picture is the proportion of the wrong AH. The width of the picture in the first carousel is 2:1 of the width of the picture in the second carousel, so I set the first carousel width to 66% and the second to 33%. can be displayed correctly.

On the mobile phone side, two pictures side, the picture how to set the proportion