Final answer:
The percentage of Holland's Jews who died during the Holocaust is not specified, but approximately 6 million Jews died in the Holocaust, including those from Holland.
Step-by-step explanation:
The percentage of Holland's Jews who died during the war is not mentioned in the provided information. However, the Holocaust, which was the systematic genocide of European Jews by Nazi Germany during World War II, resulted in the deaths of approximately 6 million Jews, including those from Holland. The Holocaust had a significant impact on the Jewish population in Holland, but without specific data, it is not possible to provide an exact percentage.