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multiplying by 1.0 or 1.00 when dividing

I am trying to understand the exact difference between my code below,

count(CASE WHEN action = 'accepted' THEN 1 ELSE NULL END) * 1.0 / count(action) as perc

count(CASE WHEN action = 'accepted' THEN 1 ELSE NULL END) * 1.00 / count(action) as perc

When I test both give me same answer, but I have also seen it written both ways so wanted to know to be precise if there was any difference?