Fixed convertToPercentage function by removing variable shadowing and verified correct output

Author: Eugenie-A

Sprint-2/1-key-errors/1.js

@@ -2,9 +2,14 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// Prediction: The error will occur because the variable 'decimalNumber' is being redeclared 
+// inside the function using 'const', which is an illegal operation. 
+// Variables declared with 'const' cannot be redeclared in the same scope.
 
 // Try playing computer with the example to work out what is going on
 
+/*
+Original code:
 function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
@@ -13,8 +18,18 @@ function convertToPercentage(decimalNumber) {
 }
 
 console.log(decimalNumber);
+*/
 
 // =============> write your explanation here
+// Explanation: The error occurs because 'decimalNumber' is declared as a parameter of the function. 
+// When we try to declare it again inside the function with 'const', it causes a syntax error.
+// To fix this, we should either use the parameter directly or rename the inner variable.
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5)); // Output: 50%