diff --git a/lib/convert-worker.js b/lib/convert-worker.js
index 069d369..f4622e9 100644
--- a/lib/convert-worker.js
+++ b/lib/convert-worker.js
@@ -543,11 +543,14 @@ function fixHyphens(xml) {
   xml = xml.replace(/(\w+)[ -]year[ -]old(s?)(?!\w)/g, "$1-year-old$2");
   xml = xml.replace(/(\w+) or (\w+)-year-old/g, "$1- or $2-year-old");
 
-  // Compound numbers must be hyphenated.
+  // Compound numbers from 11 through 99 must be hyphenated, but others should not be.
   xml = xml.replace(
     /(?<!\w)(twenty|thirty|fourty|fifty|sixty|seventy|eighty|ninety) (one|two|three|four|five|six|seven|eight|nine)/ig,
     "$1-$2"
   );
+  xml = xml.replace(/[- ]hundred-and-/g, " hundred and ");
+  xml = xml.replace(/(?<!-)(one|two|three|four|five|six|seven|eight|nine|twelve)-hundred/, "$1 hundred");
+  xml = xml.replace(/(hundred|ninety)-percent(?!-)/g, "$1 percent");
 
   // These are consistently missing hyphens.
   xml = xml.replace(/self destruct/g, "self-destruct");
diff --git a/lib/substitutions.json b/lib/substitutions.json
index 9ea2728..a9efd6a 100644
--- a/lib/substitutions.json
+++ b/lib/substitutions.json
@@ -2386,6 +2386,10 @@
     {
       "before": "better pictures of mom",
       "after": "better pictures of Mom"
+    },
+    {
+      "before": "five-hundred percent",
+      "after": "five hundred percent"
     }
   ],
   "https://parahumans.wordpress.com/2012/11/20/interlude-15/": [
@@ -3101,6 +3105,10 @@
     {
       "before": "I know you and dad won’t approve",
       "after": "I know you and Dad won’t approve"
+    },
+    {
+      "before": "hundred and ten-percent",
+      "after": "hundred and ten percent"
     }
   ],
   "https://parahumans.wordpress.com/2013/04/16/imago-21-3/": [
@@ -3502,6 +3510,10 @@
     {
       "before": "Master and stranger",
       "after": "master and stranger"
+    },
+    {
+      "before": "nearly-three-hundred",
+      "after": "nearly three hundred"
     }
   ],
   "https://parahumans.wordpress.com/2013/07/20/sting-26-2/": [
@@ -5623,6 +5635,10 @@
       "regExp": "the pharmacist",
       "replacement": "the Pharmacist",
       "_comment": "in the previous chapter, 'the Pharmacist' starts getting capitalized consistently, as if it's a name instead of a profession. Carry it forward."
+    },
+    {
+      "before": "one hundred and ten-percent",
+      "after": "one hundred and ten percent"
     }
   ],
   "https://www.parahumans.net/2018/10/02/gleaming-9-12/": [