Update percentage constants

packages/contracts/src/2.0.0/forwarder/MixinWeth.sol

@@ -29,9 +29,9 @@ contract MixinWeth is
     MWeth
 {
 
-    uint256 constant internal PERCENTAGE_DENOMINATOR = 10000; // 9800 == 98%, 10000 == 100%
-    uint256 constant internal MAX_FEE_PERCENTAGE = 500;  // 5%
-    uint256 constant internal MAX_WETH_FILL_PERCENTAGE = 9500;  // 95%
+    uint256 constant internal PERCENTAGE_DENOMINATOR = 10**18; 
+    uint256 constant internal MAX_FEE_PERCENTAGE = 5 * PERCENTAGE_DENOMINATOR / 100;         // 5%
+    uint256 constant internal MAX_WETH_FILL_PERCENTAGE = 95 * PERCENTAGE_DENOMINATOR / 100;  // 95%
 
     /// @dev Default payabale function, this allows us to withdraw WETH
     function ()

packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol

@@ -32,6 +32,7 @@ contract MixinWrapperFunctions is
     LibAbiEncoder,
     MExchangeCore
 {
+
     /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
     /// @param order Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.

packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol

@@ -103,20 +103,20 @@ contract LibOrder is
         bytes32 takerAssetDataHash = keccak256(order.takerAssetData);
 
         // Assembly for more efficiently computing:
-        //    keccak256(abi.encode(
-        //        order.makerAddress,
-        //        order.takerAddress,
-        //        order.feeRecipientAddress,
-        //        order.senderAddress,
-        //        order.makerAssetAmount,
-        //        order.takerAssetAmount,
-        //        order.makerFee,
-        //        order.takerFee,
-        //        order.expirationTimeSeconds,
-        //        order.salt,
-        //        keccak256(order.makerAssetData),
-        //        keccak256(order.takerAssetData)
-        //    ));
+        // keccak256(abi.encode(
+        //     order.makerAddress,
+        //     order.takerAddress,
+        //     order.feeRecipientAddress,
+        //     order.senderAddress,
+        //     order.makerAssetAmount,
+        //     order.takerAssetAmount,
+        //     order.makerFee,
+        //     order.takerFee,
+        //     order.expirationTimeSeconds,
+        //     order.salt,
+        //     keccak256(order.makerAssetData),
+        //     keccak256(order.takerAssetData)
+        // ));
 
         assembly {
             // Backup