README.md in financial_maths-0.0.1 vs README.md in financial_maths-0.0.2

@@ -1,8 +1,8 @@
 # FinancialMaths
 
-TODO: Write a gem description
+more functions will be added soon
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
@@ -15,11 +15,34 @@
 Or install it yourself as:
 
     $ gem install financial_maths
 
 ## Usage
+```ruby
+require "financial_maths"
 
-TODO: Write usage instructions here
+include FinancialMaths
+
+calculate = Credit.new
+```
+
+### Calculate Fixed payment equity
+A credit in a period of 15 years, the amount is $100.000.000 and the interest is 1.44594763%, 
+call the method following the next instruction.
+	
+```ruby
+calculate.fixed_payment_equity(15,100000000,0.0144594763)
+```
+The result is a hash with the plan of payments, it looks like that
+	
+	[{:period=>0, :monthly_payment=>nil, :interest=>nil, :payment=>nil, :balance=>100000000}, 
+	{:period=>1, :payment=>2001502.63, :interest=>1445947.63, :monthly_payment=>555555, :balance=>99444445},
+	{:period=>2, :payment=>1993469.5956441534, :interest=>1437914.5956441534, :monthly_payment=>555555, :balance=>98888890},
+	...
+	..
+	.
+	]
+
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)