diff --git a/src/CalcManager/CalculatorManager.cpp b/src/CalcManager/CalculatorManager.cpp
index e6d1f9b..8d6f1e5 100644
--- a/src/CalcManager/CalculatorManager.cpp
+++ b/src/CalcManager/CalculatorManager.cpp
@@ -681,96 +681,4 @@ namespace CalculationManager
     {
         m_inHistoryItemLoadMode = isHistoryItemLoadMode;
     }
-
-    /// <summary>
-    /// Serialize Rational to vector of long
-    /// How Rational is serialized :
-    ///     Serialized Rational.P(Number) + Serialized Rational.Q(Number)
-    /// How Number is saved :
-    ///     [0] = Rational.P.Sign
-    ///     [1] = Rational.P.Mantissa.size
-    ///     [2] = Rational.P.Exp
-    ///     [3] = Rational.P.Mantissa[0]
-    ///     [4] = Rational.P.Mantissa[1]
-    ///       ...
-    ///     [2 + Rational.P.Mantissa.size] = Rational.P.Mantissa[size - 1]
-    /// </summary>
-    /// <param name = "rat">Rational number to be serialized</param>
-    vector<long> CalculatorManager::SerializeRational(Rational const& rat)
-    {
-        vector<long> serializedRational{};
-
-        auto serialP = SerializeNumber(rat.P());
-        serializedRational.insert(serializedRational.end(), serialP.begin(), serialP.end());
-
-        auto serialQ = SerializeNumber(rat.Q());
-        serializedRational.insert(serializedRational.end(), serialQ.begin(), serialQ.end());
-
-        return serializedRational;
-    }
-
-    /// <summary>
-    /// DeserializeRational vector and construct a Rational
-    /// How Rational is serialized :
-    ///     Serialized Rational.P(Number) + Serialized Rational.Q(Number)
-    /// </summary>
-    Rational CalculatorManager::DeSerializeRational(vector<long>::const_iterator itr)
-    {
-        auto p = DeSerializeNumber(itr);
-        auto q = DeSerializeNumber(itr + SERIALIZED_NUMBER_MINSIZE + p.Mantissa().size());
-
-        return Rational(p, q);
-    }
-
-    /// <summary>
-    /// Serialize Number to vector of long
-    /// How Number is saved :
-    ///     [0] = Number.Sign
-    ///     [1] = Number.Mantissa.size
-    ///     [2] = Number.Exp
-    ///     [3] = Number.Mantissa[0]
-    ///     [4] = Number.Mantissa[1]
-    ///       ...
-    ///     [2 + Number.Mantissa.size] = Number.Mantissa[size - 1]
-    /// </summary>
-    /// <param name = "num">Number to be serialized</param>
-    vector<long> CalculatorManager::SerializeNumber(Number const& num)
-    {
-        vector<long> serializedNumber{};
-
-        serializedNumber.push_back(num.Sign());
-        serializedNumber.push_back(static_cast<long>(num.Mantissa().size()));
-        serializedNumber.push_back(num.Exp());
-        for (auto const& digit : num.Mantissa())
-        {
-            serializedNumber.push_back(digit);
-        }
-
-        return serializedNumber;
-    }
-
-    /// <summary>
-    /// DeserializeNumber vector and construct a Number
-    /// How Number is saved :
-    ///     [0] = Number.Sign
-    ///     [1] = Number.Mantissa.size
-    ///     [2] = Number.Exp
-    ///     [3] = Number.Mantissa[0]
-    ///     [4] = Number.Mantissa[1]
-    ///       ...
-    ///     [2 + Number.Mantissa.size] = Number.Mantissa[size - 1]
-    /// </summary>
-    Number CalculatorManager::DeSerializeNumber(vector<long>::const_iterator itr)
-    {
-        int32_t sign = *itr;
-        uint32_t size = *(itr + 1);
-        int32_t exp = *(itr + 2);
-        vector<uint32_t> mant{};
-        for (size_t i = 0; i < size; ++i)
-        {
-            mant.emplace_back(*(itr + 3 + i));
-        }
-
-        return Number{ sign, exp, mant };
-    }
 }
diff --git a/src/CalcManager/CalculatorManager.h b/src/CalcManager/CalculatorManager.h
index 9b38242..dd30c16 100644
--- a/src/CalcManager/CalculatorManager.h
+++ b/src/CalcManager/CalculatorManager.h
@@ -76,12 +76,6 @@ namespace CalculationManager
 
         void LoadPersistedPrimaryValue();
 
-        static std::vector<long> SerializeRational(CalcEngine::Rational const& rat);
-        static CalcEngine::Rational DeSerializeRational(std::vector<long>::const_iterator itr);
-
-        static std::vector<long> SerializeNumber(CalcEngine::Number const& num);
-        static CalcEngine::Number DeSerializeNumber(std::vector<long>::const_iterator itr);
-
         std::shared_ptr<CalculatorHistory> m_pStdHistory;
         std::shared_ptr<CalculatorHistory> m_pSciHistory;
         CalculatorHistory* m_pHistory;