fix percentage conversion variable redeclaration

Author: anitahy73

Sprint-3/1-key-errors/1.js

@@ -1,7 +1,9 @@
-// Predict and explain first...
+// Predict and explain first...:It doesn't run.We have a syntaxError.
 
-// Why will an error occur when this program runs?
-// =============> write your prediction here
+// Why will an error occur when this program runs?because decimalNumber is declared.
+// as a parameter and then declared again using const.
+
+// =============> write your prediction here:We will have a SyntaxError because decimalNumber is  a parameter of the function, but it is declared again using const inside the function.
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +16,14 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> write your explanation here:decimalNumber is inside the function, so we can not use it outside the function.
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+ ca
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));