How to show a part of the next slide

I want to see a part of the next slide

As described on this post: https://stackoverflow.com/questions/38406690/swiper-slides-showing-end-s..., I want to show a part of the next slide on each predefined swiper (depending of breakpoints).

Apparently, we must use a decimal value for the slidesPerView setting. But, on the settings of the swiper, I can't use decimal value (Integer value - slides visible at the same time on slider's container)

How can I add a decimal value for this setting ? Or, is there another possibility to set this value ?

Thanks