diff --git a/llm_web_kit/extractor/html/recognizer/cc_math/tag_math.py b/llm_web_kit/extractor/html/recognizer/cc_math/tag_math.py
index 66816c2d..aed792c9 100644
--- a/llm_web_kit/extractor/html/recognizer/cc_math/tag_math.py
+++ b/llm_web_kit/extractor/html/recognizer/cc_math/tag_math.py
@@ -52,6 +52,9 @@ def modify_tree(cm: CCMATH, math_render: str, o_html: str, node: HtmlElement, pa
                 mathml = re.sub(r'([^\s])\s+([^\s])', r'\1 \2', mathml)  # remove extra spaces
 
             latex = cm.mml_to_latex(mathml)
+            # 处理未转义的%为\%
+            if latex:
+                latex = re.sub(r'(?<!\\)%', r'\\%', latex)
             text = cm.wrap_math_md(latex)
             if text:
                 # Set the html of the new span tag to the text
diff --git a/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage.html b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage.html
new file mode 100644
index 00000000..41d529c9
--- /dev/null
+++ b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage.html
@@ -0,0 +1,104 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Mathematical Formulas with Percent Symbol</title>
+    <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+    <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
+    <script>
+        window.MathJax = {
+            tex: {
+                inlineMath: [['$', '$'], ['\\(', '\\)']],
+                displayMath: [['$$', '$$'], ['\\[', '\\]']]
+            }
+        };
+    </script>
+</head>
+<body>
+<h1>Mathematical Formulas Containing % Symbol</h1>
+
+<h2>1. LaTeX Format Examples</h2>
+
+<h3>Inline LaTeX formulas:</h3>
+<p>The percentage increase is calculated as $\frac{new - old}{old} \times 100\%$.</p>
+
+<h3>Display LaTeX formulas:</h3>
+<p>Compound interest formula:</p>
+$$A = P\left(1 + \frac{r\%}{n}\right)^{nt}$$
+
+<h2>2. MathML Format Examples</h2>
+
+<p>Percentage change in MathML:</p>
+<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
+    <mrow>
+        <mi>Δ</mi>
+        <mo>%</mo>
+        <mo>=</mo>
+        <mfrac>
+            <mrow>
+                <mi>new</mi>
+                <mo>-</mo>
+                <mi>old</mi>
+            </mrow>
+            <mi>old</mi>
+        </mfrac>
+        <mo>×</mo>
+        <mn>100</mn>
+        <mo>%</mo>
+    </mrow>
+</math>
+
+<p>Discount percentage:</p>
+<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">
+    <mrow>
+        <mi>Discount</mi>
+        <mo>%</mo>
+        <mo>=</mo>
+        <mfrac>
+            <mrow>
+                <mi>Original</mi>
+                <mo>-</mo>
+                <mi>Sale</mi>
+            </mrow>
+            <mi>Original</mi>
+        </mfrac>
+        <mo>×</mo>
+        <mn>100</mn>
+        <mo>%</mo>
+    </mrow>
+</math>
+
+<p>Puyu badcase:</p>
+<math display="block">
+    <mtable xmlns="http://www.w3.org/1998/Math/MathML" columnalign="left">
+        <mtr>
+            <mtd class="align-1">
+                <mi>%</mi>
+                <mspace width="0.25em"/>
+                <mtext>Cell Death</mtext>
+                <mo>=</mo>
+            </mtd>
+            <mtd class="align-2">
+                <mo>(</mo>
+                <mn>1</mn>
+                <mo>−</mo>
+                <mo>(</mo>
+                <mtext>Post treatment cell counts</mtext>
+            </mtd>
+        </mtr>
+        <mtr>
+
+            <mtd class="align-2">
+                <mo>/</mo>
+                <mtext>initial cell counts</mtext>
+                <mo>)</mo>
+                <mo>)</mo>
+                <mo>*</mo>
+                <mn>100</mn>
+            </mtd>
+        </mtr>
+    </mtable>
+</math>
+</body>
+</html>
diff --git a/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_1.html b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_1.html
new file mode 100644
index 00000000..e29bbe09
--- /dev/null
+++ b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_1.html
@@ -0,0 +1,3 @@
+A = P\left(1 + \frac{r\%}{n}\right)^{nt}
+\Delta \%=\frac{\mathrm{new}-\mathrm{old}}{\mathrm{old}}×100\%
+\begin{array}{ll}\%\text{Cell Death}=& \left(1-\left(\text{Post treatment cell counts}\\ /\text{initial cell counts}\right)\right)*100\end{array}
\ No newline at end of file
diff --git a/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_inline_1.html b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_inline_1.html
new file mode 100644
index 00000000..1fcfe99a
--- /dev/null
+++ b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_inline_1.html
@@ -0,0 +1,2 @@
+\frac{new - old}{old} \times 100\%
+\mathrm{Discount}\%=\frac{\mathrm{Original}-\mathrm{Sale}}{\mathrm{Original}}×100\%
\ No newline at end of file
diff --git a/tests/llm_web_kit/extractor/html/recognizer/test_math.py b/tests/llm_web_kit/extractor/html/recognizer/test_math.py
index f41af0c0..a6e1825e 100644
--- a/tests/llm_web_kit/extractor/html/recognizer/test_math.py
+++ b/tests/llm_web_kit/extractor/html/recognizer/test_math.py
@@ -216,6 +216,14 @@
         'base_url': 'https://convertoctopus.com/4-7-years-to-minutes',
         'expected': 'assets/ccmath/math_class_math_1.html',
         'expected_inline': 'assets/ccmath/math_class_math_inline_1.html'
+    },
+    {
+        'input': [
+            'assets/ccmath/math_percentage.html',
+        ],
+        'base_url': 'https://test.com/',
+        'expected': 'assets/ccmath/math_percentage_1.html',
+        'expected_inline': 'assets/ccmath/math_percentage_inline_1.html'
     }
 ]
 
