We show a percentage increase in cases and deaths. That percentage is increase is calculated as (casesOnLastDay - casesOnPreviousDay) / casesOnLastDay.
There's a potential problem with it. We can hear in the news that, say, in the UK there's been the highest number of deaths on a single day - 1,000. So if each day from that one there are 1,000 more deaths on each single day, then our percentage increase would start to go down.
Indeed, although the number is terrifying it stays the same, while the total numbers keeps growing. Hence, it's share in total drops with every single day.
A better option would be to see how numbers grow in relation to the previous increase, a.k.a we can use this formula: