How many % organic traffic compared to paid would you expect to have on an online store?

Title speaks for itself. How many percent organic traffic compared to paid traffic would you expect to have on an online shop?

I have noticed that my organic traffic dramatically increases when I also increase google ads budget, which to me seems a little weird but they seem to follow eachother. It seems like google just won't give me x amount of organic traffic unless I also pay for x amount of traffic. Is this something more of you have noticed?