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..e4860781
--- /dev/null
+++ b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage.html
@@ -0,0 +1 @@
+<!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></body></html>
\ No newline at end of file
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..b19496cf
--- /dev/null
+++ b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_1.html
@@ -0,0 +1 @@
+A = P\left(1 + \frac{r\%}{n}\right)^{nt}\Delta \%=\frac{\mathrm{new}-\mathrm{old}}{\mathrm{old}}×100\%
\ 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..23c13989
--- /dev/null
+++ b/tests/llm_web_kit/extractor/html/recognizer/assets/ccmath/math_percentage_inline_1.html
@@ -0,0 +1 @@
+\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'
     }
 ]
 
