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  1. or download this
    use strict;

...
$ammount = 159.5;
$value   = ($ammount*119)/100;
print sprintf($response, $value);
  2. or download this
    Value should be 189.81 (rounded to two decimals) and sprintf gives us:
+ 189.804999999999978399500833
Value should be 189.81 (rounded to two decimals) and sprintf gives us:
+ 189.805000000000006821210263