diff --git a/sysfs/sysfswrite.cpp b/sysfs/sysfswrite.cpp
new file mode 100644
index 0000000..c3e1b03
--- /dev/null
+++ b/sysfs/sysfswrite.cpp
@@ -0,0 +1,48 @@
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <fstream>
+#include <iostream>
+
+#include "sysfswrite.hpp"
+
+
+void SysFsWritePercent::write(double value)
+{
+    float minimum = getMin();
+    float maximum = getMax();
+
+    float range = maximum - minimum;
+    float offset = range * value;
+    float ovalue = offset + minimum;
+
+    std::ofstream ofs;
+    ofs.open(_writepath);
+    ofs << static_cast<int64_t>(ovalue);
+    ofs.close();
+
+    return;
+}
+
+void SysFsWrite::write(double value)
+{
+    std::ofstream ofs;
+    ofs.open(_writepath);
+    ofs << static_cast<int64_t>(value);
+    ofs.close();
+
+    return;
+}