diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e8046b81b2..a086fa4775 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1 +1 @@
- All contributions, bug reports, bug fixes, documentation improvements, enhancements, and ideas are welcome.
+All contributions, bug reports, bug fixes, documentation improvements, enhancements, and ideas are welcome.
diff --git a/simple-interest.sh b/simple-interest.sh
index 27a60fcb55..15e1e4b5e7 100755
--- a/simple-interest.sh
+++ b/simple-interest.sh
@@ -1,26 +1,28 @@
-#!/bin/bash
-# This script calculates simple interest given principal, annual rate of interest and time period in years.
-# Do not use this in production. Sample purpose only.
+   #!/bin/bash
+   # This script calculates simple interest given principal,
+   # annual rate of interest and time period in years.
 
-# Author: Upkar Lidder (IBM)
-# Addtional Authors:
-# <your Github username>
+   # Do not use this in production. Sample purpose only.
 
-# Input:
-# p, principal amount
-# t, time period in years
-# r, annual rate of interest
+   # Author: Upkar Lidder (IBM)
+   # Additional Authors:
+   # <your GitHub username>
 
-# Output:
-# simple interest = p*t*r
+   # Input:
+   # p, principal amount
+   # t, time period in years
+   # r, annual rate of interest
 
-echo "Enter the principal:"
-read p
-echo "Enter rate of interest per year:"
-read r
-echo "Enter time period in years:"
-read t
+   # Output:
+   # simple interest = p*t*r
 
-s=$(expr $p \* $t \* $r / 100)
-echo "The simple interest is: "
-echo $s
+   echo "Enter the principal:"
+   read p
+   echo "Enter rate of interest per year:"
+   read r
+   echo "Enter time period in years:"
+   read t
+
+   s=`expr $p \* $t \* $r / 100`
+   echo "The simple interest is: "
+   echo $s
\ No newline at end of file