diff --git a/Runtime/Component/Main/Tooltip.cs b/Runtime/Component/Main/Tooltip.cs
index 7aab7490..ae48f286 100644
--- a/Runtime/Component/Main/Tooltip.cs
+++ b/Runtime/Component/Main/Tooltip.cs
@@ -109,6 +109,7 @@ namespace XCharts
         /// {c1:2} represents the third data from serie's current indication data item indexed to 1 (a data item has multiple data, index 2 represents the third data).
         /// {c1:2-2} represents the third data item from serie's third data item indexed to 1 (i.e., which data item must be specified to specify).
         /// {d1:2: F2} indicates that a formatted string with a value specified separately is F2 (numericFormatter is used when numericFormatter is not specified).
+        /// {d:0.##} indicates that a formatted string with a value specified separately is 0.##   (used for percentage, reserved 2 valid digits while avoiding the situation similar to "100.00%" when using f2 ).
         /// Example: "{a}, {c}", "{a1}, {c1: f1}", "{a1}, {c1:0: f1}", "{a1} : {c1:1-1: f1}"
         /// 提示框总内容的字符串模版格式器。支持用 \n 换行。当formatter不为空时，优先使用formatter，否则使用itemFormatter。
         /// 模板变量有{.}、{a}、{b}、{c}、{d}。
@@ -122,6 +123,7 @@ namespace XCharts
         /// {c1:2}表示索引为1的serie的当前指示数据项的第3个数据（一个数据项有多个数据，index为2表示第3个数据）。
         /// {c1:2-2}表示索引为1的serie的第3个数据项的第3个数据（也就是要指定第几个数据项时必须要指定第几个数据）。
         /// {d1:2:f2}表示单独指定了数值的格式化字符串为f2（不指定时用numericFormatter）。
+        /// {d:0.##} 表示单独指定了数值的格式化字符串为 0.## （用于百分比，保留2位有效数同时又能避免使用 f2 而出现的类似于"100.00%"的情况 ）。
         /// 示例："{a}:{c}"、"{a1}:{c1:f1}"、"{a1}:{c1:0:f1}"、"{a1}:{c1:1-1:f1}"
         /// </summary>
         public string formatter { get { return m_Formatter; } set { m_Formatter = value; } }
diff --git a/Runtime/Helper/FormatterHelper.cs b/Runtime/Helper/FormatterHelper.cs
index 665d53c3..aef41c84 100644
--- a/Runtime/Helper/FormatterHelper.cs
+++ b/Runtime/Helper/FormatterHelper.cs
@@ -15,11 +15,11 @@ namespace XCharts
     public static class FormatterHelper
     {
         public const string PH_NN = "\n";
-        private static Regex s_Regex = new Regex(@"{([a-d|.]\d*)(:\d+(-\d+)?)?(:[c-g|x|p|r]\d*)?}", RegexOptions.IgnoreCase);
-        private static Regex s_RegexSub = new Regex(@"(\w?-?\d+)|(\w)|(\.)", RegexOptions.IgnoreCase);
+        private static Regex s_Regex = new Regex(@"{([a-d|.]\d*)(:\d+(-\d+)?)?(:[c-g|x|p|r]\d*|:0\.#*)?}", RegexOptions.IgnoreCase);
+        private static Regex s_RegexSub = new Regex(@"(0\.#*)|(\d+-\d+)|(\w+)|(\.)", RegexOptions.IgnoreCase);
         private static Regex s_RegexN = new Regex(@"^\d+", RegexOptions.IgnoreCase);
         private static Regex s_RegexN_N = new Regex(@"\d+-\d+", RegexOptions.IgnoreCase);
-        private static Regex s_RegexFn = new Regex(@"[c-g|x|p|r]\d*", RegexOptions.IgnoreCase);
+        private static Regex s_RegexFn = new Regex(@"[c-g|x|p|r]\d*|0\.#*", RegexOptions.IgnoreCase);
         private static Regex s_RegexNewLine = new Regex(@"[\\|/]+n", RegexOptions.IgnoreCase);
         private static Regex s_RegexForAxisLabel = new Regex(@"{value(:[c-g|x|p|r]\d*)?}", RegexOptions.IgnoreCase);
         private static Regex s_RegexSubForAxisLabel = new Regex(@"(value)|([c-g|x|p|r]\d*)", RegexOptions.IgnoreCase);