diff --git a/src/Psalm/Internal/Analyzer/Statements/Block/IfElse/IfAnalyzer.php b/src/Psalm/Internal/Analyzer/Statements/Block/IfElse/IfAnalyzer.php
index 8b277f8e62e..9e61c6a1a23 100644
--- a/src/Psalm/Internal/Analyzer/Statements/Block/IfElse/IfAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/Statements/Block/IfElse/IfAnalyzer.php
@@ -312,12 +312,21 @@ private static function handleMicDrop(
                 if (!$post_if_context->collect_initializations
                     && !$post_if_context->collect_mutations
                     && $statements_analyzer->getFilePath() === $statements_analyzer->getRootFilePath()
-                    && (!(($parent_source = $statements_analyzer->getSource())
-                                instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer)
-                            || !$parent_source->getSource() instanceof \Psalm\Internal\Analyzer\TraitAnalyzer)
                 ) {
-                    $codebase = $statements_analyzer->getCodebase();
-                    $codebase->analyzer->decrementMixedCount($statements_analyzer->getFilePath());
+                    $parent_source = $statements_analyzer->getSource();
+
+                    $functionlike_storage = $parent_source instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer
+                        ? $parent_source->getFunctionLikeStorage()
+                        : null;
+
+                    if (!$parent_source instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer
+                            || (!$parent_source->getSource() instanceof \Psalm\Internal\Analyzer\TraitAnalyzer
+                                && (!$functionlike_storage
+                                    || !isset($functionlike_storage->param_lookup[substr($var_id, 1)])))
+                    ) {
+                        $codebase = $statements_analyzer->getCodebase();
+                        $codebase->analyzer->decrementMixedCount($statements_analyzer->getFilePath());
+                    }
                 }
 
                 IssueBuffer::remove(
diff --git a/src/Psalm/Internal/Codebase/Analyzer.php b/src/Psalm/Internal/Codebase/Analyzer.php
index 583074ca633..ae39a3e7281 100644
--- a/src/Psalm/Internal/Codebase/Analyzer.php
+++ b/src/Psalm/Internal/Codebase/Analyzer.php
@@ -1216,6 +1216,10 @@ public function decrementMixedCount(string $file_path): void
             return;
         }
 
+        if ($this->mixed_counts[$file_path][0] === 0) {
+            return;
+        }
+
         --$this->mixed_counts[$file_path][0];
     }
 
@@ -1403,7 +1407,7 @@ public function getNonMixedStats(): string
                 [$path_mixed_count, $path_nonmixed_count] = $this->mixed_counts[$file_path];
 
                 if ($path_mixed_count + $path_nonmixed_count) {
-                    $stats .= number_format(100 * $path_nonmixed_count / ($path_mixed_count + $path_nonmixed_count), 0)
+                    $stats .= number_format(100 * $path_nonmixed_count / ($path_mixed_count + $path_nonmixed_count), 3)
                         . '% ' . $this->config->shortenFileName($file_path)
                         . ' (' . $path_mixed_count . ' mixed)' . "\n";
                 }