Added missing const variable declaration

Author: Shayida999

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -30,10 +30,10 @@ priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
 
 let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
+
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
 
-
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
 replaceAll gets rid of the commas → "10,000" becomes "10000".