diff --git a/C++/ratio.cpp b/C++/ratio.cpp
new file mode 100644
index 0000000..edde518
--- /dev/null
+++ b/C++/ratio.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <ratio>
+
+namespace ratio
+{
+    int main() {
+        std::ratio<1, 1000000> micro = std::micro();
+        std::ratio<1, 1000000000> nano = std::nano();
+        std::ratio<1, 1000000000000> pico = std::pico();
+    
+        std::cout << "micro: " << micro.num << "/" << micro.den << "\n";
+        std::cout << "nano: " << nano.num << "/" << nano.den << "\n";
+        std::cout << "pico: " << pico.num << "/" << pico.den << "\n";
+    
+        return 0;
+    }
+}
+