Complex sentence: Jewish businesses were targeted for closure or "Aryanization", the forcible sale to Germans; of the approximately 50,000 Jewish-owned businesses in Germany in 1933, about 7,000 were still Jewish-owned in April 1939.
Split into simpler sentences: Jewish businesses were also targeted for either closure or "Aryanisation", the forcible sale to Germans. Of the approximately 50,000 Jewish-owned businesses in Germany in 1933, only about 7,000 were still Jewish-owned in April 1939.