The wording of Revised Standard Version, following the Hebrew, is long and repetitious, but the essential meaning is captured by Good News Translation in fewer words and a much simpler structure.

He shall refund: that is, the Israelite must pay back an amount equivalent to the value of a hired worker for the number of years left until the next Year of Restoration.

Quoted with permission from Péter-Contesse, René and Ellington, John. A Handbook on Leviticus. (UBS Helps for Translators). New York: UBS, 1990. For this and other handbooks for translators see here .