The Basic Education minister says she hopes the supplementary exams will push up the percentage.
A total of 85,45 percent of candidates qualified to study towards degrees.
The quality assurer believes teachers and exam supervisors may have been involved.
Gauteng's Education MEC says officials whose matric results are below standard, will be shown the door.
Michael Masutha has urged all offenders to make use of available educational opportunities.
The WC education, transport & public works depts have combined efforts to ensure undisrupted matric exams.