You can use the "Change" event of the Grid DataSource to track for changes in Teach%, Sch%, Cit% columns. When the event is triggered you can recalculate the Total% column as demonstrated in the following example:
|| e.field ===
model = e.items;
, model.OrderTotal + model.TransactionFee);
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.