1 files changed, 28 insertions, 25 deletions
diff --git a/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb b/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb
index dcf9a567e8..df316a08e6 100644
--- a/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb
+++ b/activesupport/lib/active_support/number_helper/number_to_rounded_converter.rb
@@ -6,36 +6,39 @@ module ActiveSupport
 
       def convert
         precision = options.delete :precision
-        significant = options.delete :significant
 
-        case number
-        when Float, String
-          @number = BigDecimal(number.to_s)
-        when Rational
-          @number = BigDecimal(number, digit_count(number.to_i) + precision)
-        else
-          @number = number.to_d
-        end
-
-        if significant && precision > 0
-          digits, rounded_number = digits_and_rounded_number(precision)
-          precision -= digits
-          precision = 0 if precision < 0 # don't let it be negative
-        else
-          rounded_number = number.round(precision)
-          rounded_number = rounded_number.to_i if precision == 0
-          rounded_number = rounded_number.abs if rounded_number.zero? # prevent showing negative zeros
-        end
+        if precision
+          case number
+          when Float, String
+            @number = BigDecimal(number.to_s)
+          when Rational
+            @number = BigDecimal(number, digit_count(number.to_i) + precision)
+          else
+            @number = number.to_d
+          end
 
-        formatted_string =
-          if BigDecimal === rounded_number && rounded_number.finite?
-            s = rounded_number.to_s('F') + '0'*precision
-            a, b = s.split('.', 2)
-            a + '.' + b[0, precision]
+          if options.delete(:significant) && precision > 0
+            digits, rounded_number = digits_and_rounded_number(precision)
+            precision -= digits
+            precision = 0 if precision < 0 # don't let it be negative
           else
-            "%00.#{precision}f" % rounded_number
+            rounded_number = number.round(precision)
+            rounded_number = rounded_number.to_i if precision == 0
+            rounded_number = rounded_number.abs if rounded_number.zero? # prevent showing negative zeros
           end
 
+          formatted_string =
+            if BigDecimal === rounded_number && rounded_number.finite?
+              s = rounded_number.to_s('F') + '0'*precision
+              a, b = s.split('.', 2)
+              a + '.' + b[0, precision]
+            else
+              "%00.#{precision}f" % rounded_number
+            end
+        else
+          formatted_string = number
+        end
+
         delimited_number = NumberToDelimitedConverter.convert(formatted_string, options)
         format_number(delimited_number)
       end