PERCENT

Purpose: This property is used by an assignee or delegatee of a to-do to convey the percent completion of a to-do to the "Organizer". The value must either be null or between 0 and 100. The value 0 is interpreted as null. If a value outside of the boundaries (0-100) is passed, the value is reset to null. See [https://tools.ietf.org/html/rfc5545#section-3.8.1.8] Type: Int