and you will plant
"that you might sow"
At the harvest, you must give a fifth to Pharaoh, and four parts will be your own
The word "fifth" is a fraction. AT: "At harvest time you will divide the crops into five parts. You will give one part back to Pharaoh for payment and the four parts are for your own" (See: rc://en/ta/man/translate/translate-fraction)
for food for your households and your children
You can state clearly the understood information. AT: "for food for your households and for food for your children" (See: rc://en/ta/man/translate/figs-ellipsis)