diff --git a/Compiler/src/Compiler.cpp b/Compiler/src/Compiler.cpp
index cc605e87..cacd3266 100644
--- a/Compiler/src/Compiler.cpp
+++ b/Compiler/src/Compiler.cpp
@@ -1480,14 +1480,24 @@ struct Compiler
 
     void compileExprInterpString(AstExprInterpString* expr, uint8_t target, bool targetTemp)
     {
-        // INTERP TODO: percent sign escape
         std::string formatString;
 
         unsigned int stringsLeft = expr->strings.size;
 
         for (AstArray<char> const& string : expr->strings)
         {
-            formatString += string.data;
+            std::string stringEscaped(string.data);
+
+            for (size_t characterIndex = 0; characterIndex < stringEscaped.size(); ++characterIndex)
+            {
+                if (stringEscaped[characterIndex] == '%')
+                {
+                    stringEscaped.insert(characterIndex, 1, '%');
+                    characterIndex++;
+                }
+            }
+
+            formatString += stringEscaped;
 
             stringsLeft--;
 
diff --git a/tests/conformance/stringinterp.lua b/tests/conformance/stringinterp.lua
index 135fbf1b..d59427f3 100644
--- a/tests/conformance/stringinterp.lua
+++ b/tests/conformance/stringinterp.lua
@@ -43,8 +43,8 @@ assertEq(`Hello {`from inside {"a nested string"}`}`, "Hello from inside a neste
 
 assertEq(`1 {`2 {`3 {4}`}`}`, "1 2 3 4")
 
--- local health = 50
--- assert(`You have {health}% health` == "You have 50% health")
+local health = 50
+assert(`You have {health}% health` == "You have 50% health")
 
 -- INTERP TODO: Test with shadowing `string` (both as a string and not)