Cannot evaluate expression: division by zero

[sianet]

Hello.

Could you please help me with a calculated item?

He can't do the division. Error: Cannot evaluate expression: division by zero

Item calculated:

100*(last("emc.vnx.perf.IOTimeCounter[{#DISKPERFDEVICEID}]")/(last("emc.vnx.perf.IOTimeCounter[{#DISKPERFDEVICEID}]") + last("emc.vnx.perf.IdleTimeCounter[{#DISKPERFDEVICEID}]")))

I tried to use some suggested changes in the following link:

https://www.zabbix.com/forum/zabbix-help/21474-the-problem-of-division-by-zero

but it also didn't work

thank you so much for the space

Best Regards,