diff --git a/compare.jq b/compare.jq
index f663eb6..326b4de 100644
--- a/compare.jq
+++ b/compare.jq
@@ -1,8 +1,8 @@
-# Calculate the change in percentage of a nummeric key
+# Calculate the change in percentage of a numeric key
 #
 # Where .[0] is the new value, and .[1] is the old value
 def calc_change($key):
-	. as $input | $input[1][$key] - $input[0][$key];
+	. as $input | $input[0][$key] - $input[1][$key];
 
 # Calculate the change in percentage for multiple keys
 #