diff --git a/app/src/androidTest/java/com/simplemobiletools/calculator/MainActivityTest.java b/app/src/androidTest/java/com/simplemobiletools/calculator/MainActivityTest.java
index c64bd65a..0b52de1a 100644
--- a/app/src/androidTest/java/com/simplemobiletools/calculator/MainActivityTest.java
+++ b/app/src/androidTest/java/com/simplemobiletools/calculator/MainActivityTest.java
@@ -42,6 +42,22 @@ public class MainActivityTest {
         checkResult("5");
     }
 
+    @Test
+    public void clearComplexTest(){
+        press(R.id.btn_1);
+        press(R.id.btn_plus);
+        press(R.id.btn_1);
+        press(R.id.btn_decimal);
+        press(R.id.btn_5);
+        press(R.id.btn_5);
+        press(R.id.btn_clear);
+        press(R.id.btn_1);
+        press(R.id.btn_equals);
+        checkResult("2.51");
+        checkFormula("1+1.51");
+    }
+
+
     @Test
     public void additionTest() {
         press(R.id.btn_minus);
diff --git a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
index 9551c73a..e28c8d2a 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
@@ -13,7 +13,6 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
 
     private var mIsFirstOperation = false
     private var mResetValue = false
-    private var mWasPercentLast = false
     private var mBaseValue = 0.0
     private var mSecondValue = 0.0
 
@@ -62,9 +61,6 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
             setFormula(first + sign)
         } else if (!sign.isEmpty()) {
             var formula = first + sign + second
-            if (mWasPercentLast) {
-                formula += "%"
-            }
             setFormula(formula)
         }
     }
@@ -111,9 +107,6 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
 
     private fun calculateResult() {
         updateFormula()
-        if (mWasPercentLast) {
-            mSecondValue *= mBaseValue / 100
-        }
 
         val operation = OperationFactory.forId(mLastOperation!!, mBaseValue, mSecondValue)
         if (operation != null) {
@@ -124,7 +117,6 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
     }
 
     fun handleOperation(operation: String) {
-        mWasPercentLast = operation == PERCENT
         if (lastKey == DIGIT && operation != ROOT && operation != FACTORIAL) {
             handleResult()
         }
@@ -161,7 +153,6 @@ class CalculatorImpl(calculator: Calculator, val context: Context) {
             newValue = newValue.replace("\\.$".toRegex(), "")
             newValue = formatString(newValue)
             setValue(newValue)
-            mBaseValue = Formatter.stringToDouble(newValue)
         }
     }