The metric type "4864 - Proportion of Education, Health and Care (EHC) mediation cases that went on to appeal" value of 7.4 % for area Durham (Unitary) 2019 is calculated from:

5 divided by 63 + 5 multiplied by 100

"4863 - Number of EHC mediation cases that have been held which were followed by appeals to the Tribunal during the calendar year" divided by "4862 - Number of EHC mediation cases that have been held during the calendar year" + "4863 - Number of EHC mediation cases that have been held which were followed by appeals to the Tribunal during the calendar year" multiplied by 100