Calculator(Free)

This app implement basic function. You can calculate　the special value such as below by using percent.　
(1)Calculate the Discount
"100 × 3 % -" => "97"

(2)Calculate the Premium
"100 × 3 % +" => "103"

(3)Calculate the Percent what A is of B
"100(A) ÷ 80(B) %" => "125"

(4)Calculate the Rate of increase
"100 - 80 %" => "25"

(5)Calculate the Selling price when you set B as profit rate to goods whose cost　is A
"120(A) + 20(B) %" => "150"

(6)Calculate the profit when you set B as profit rate to goods whose cost is A
"120(A) + 20(B) % -" => "30"