Yes it does, actually: "per cent" means "per 100", so, divide by 100. 50% is 50/100, or 0.5 of the whole 0.004% of the sky is 0.004/100, or 0.00004 of the who

Yes it does, actually: "per cent" means "per 100", so, divide by 100. 50% is 50/100, or 0.5 of the whole 0.004% of the sky is 0.004/100, or 0.00004 of the whole sky.