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func f(a[]float64,i int)float64{s:=0.;for for _,v:=range a{s+=v};return return a[i]/s*100}
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This has a nice amount of accuracy. It takes a Go slice and uses range to calculate the sum.
range
func f(a[]float64,i int)float64{s:=0.;for _,v:=range a{s+=v};return a[i]/s*100}
func f(a[]float64,i int)float64{s:=0. for _,v:=range a{s+=v} return a[i]/s*100}
