From 2fade7f4dc56479027abf4e196a2f1e04c032eee Mon Sep 17 00:00:00 2001
From: Dennis Eichhorn <spl1nes.com@googlemail.com>
Date: Sun, 29 Oct 2017 18:34:18 +0100
Subject: [PATCH] Added calculation

---
 Business/Finance/FinanceFormulas.php | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Business/Finance/FinanceFormulas.php b/Business/Finance/FinanceFormulas.php
index 4d1ffda5b..7a311317a 100644
--- a/Business/Finance/FinanceFormulas.php
+++ b/Business/Finance/FinanceFormulas.php
@@ -754,6 +754,20 @@ class FinanceFormulas
         return log(2) / log(1 + $r);
     }
 
+    /**
+     * Get rate to dobule
+     *
+     * @param float $t Time in which to double investment
+     *
+     * @return float
+     *
+     * @since  1.0.0
+     */
+    public static function getDoublingRate(float $t) : float
+    {
+        return exp(log(2) / $t) - 1;
+    }
+
     /**
      * Doubling Time - Continuous Compounding
      *