diff --git a/lib/roo/excelx/cell/number.rb b/lib/roo/excelx/cell/number.rb
index 5cd9b552..59f95014 100644
--- a/lib/roo/excelx/cell/number.rb
+++ b/lib/roo/excelx/cell/number.rb
@@ -53,9 +53,10 @@ def generate_formatter(format)
             proc do |number|
               Kernel.format('%d%%', number.to_f * 100)
             end
-          when '0.00%'
+          when /0\.0+%/
+            precision = format.match(/0\.(0+)%/)[1].length
             proc do |number|
-              Kernel.format('%.2f%%', number.to_f * 100)
+              Kernel.format("%.#{precision}f%%", number.to_f * 100)
             end
           when '0.00E+00' then '%.2E'
           when '#,##0 ;(#,##0)' then number_format('%.0f', '(%.0f)')
diff --git a/test/excelx/cell/test_number.rb b/test/excelx/cell/test_number.rb
index ddcffeb4..7528d828 100644
--- a/test/excelx/cell/test_number.rb
+++ b/test/excelx/cell/test_number.rb
@@ -68,6 +68,7 @@ def test_formats
       ['#,##0.00', '1,042.00'],
       ['#,##0.000', '1,042.000'],
       ['0%', '104200%'],
+      ['0.0%', '104200.0%'],
       ['0.00%', '104200.00%'],
       ['0.00E+00', '1.04E+03'],
       ['#,##0 ;(#,##0)', '1,042'],