I have added a brief explanation, after each line of code, to rationalize the reasoning behind the code.

Author: khaliun-dev

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -1,27 +1,27 @@
 const penceString = "399p";
-
+// 1. const penceString = "399p": initialises a string variable with the value "399p"
 const penceStringWithoutTrailingP = penceString.substring(
   0,
   penceString.length - 1
 );
-
+//2. Removes the trailing "p" from the pencestring, leaving 399 as the new value.
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//3. This line ensures there are three characters, at least, by adding "0" to the start if necessary.  
 const pounds = paddedPenceNumberString.substring(
   0,
   paddedPenceNumberString.length - 2
 );
-
+//4. We are extracting the pounds now, ie the first character. 
 const pence = paddedPenceNumberString
   .substring(paddedPenceNumberString.length - 2)
   .padEnd(2, "0");
-
+//4. Here, we are extracting the last two digits, ie pence. Padend insures there are two digits and adds a "0" to compensate, if necessary.
 console.log(`£${pounds}.${pence}`);
+//5. Here it should show the final result of £3.99
+
 
 // This program takes a string representing a price in pence
 // The program then builds up a string representing the price in pounds
 
 // You need to do a step-by-step breakdown of each line in this program
 // Try and describe the purpose / rationale behind each step
-
-// To begin, we can start with
-// 1. const penceString = "399p": initialises a string variable with the value "399p"