Saved from https://www.codewars.com/kata/58ce8725c835848ad6000007/train/swift

my solution

func potatoes (_ p0: Int, _ w0: Int, _ p1: Int) -> Int {


let dryMatter = (Double(w0) / 100) * Double(100 - p0)

let  finalPercentOfDryMatter = 100 - p1

let w1:Int = Int(dryMatter) / (Int(finalPercentOfDryMatter) / 100)
  
   return (Int(w1))
}

/*
ERROR

solution.swift:8:5: warning: variable 'w1' was never mutated; consider changing to 'let' constant
var w1:Int = Int(dryMatter) / (Int(finalPercentOfDryMatter) / 100)
~~~ ^
let
Fatal error: Division by zero
*/