I’m trying to create a calculated item to compute memory usage percentage with the formula in Zabbix template:

(last(vm.memory.size[total]) - last(vm.memory.size[available])) / last(vm.memory.size[total]) * 100
But I get the following error:

Invalid parameter "/1/params": incorrect expression starting from "last(vm.memory.size[total]) - last(vm.memory.size[available])) / last(vm.memory.size[total]) * 100".
Zabbix Version:
7.0.5