I have a column with text cells. I want to find MIN for numbers inside these
text cells that are before " /" or "/".

I'm getting the numbers by using the following formula:
=IF(ISNUMBER(TRIM(LEFT(I7,FIND(" /",I7)))*1),TRIM(LEFT(I7,FIND("
/",I7)))*1,"")

But, I need to get the MIN for the whole column I2:I30 (without using an
additional column to get the numbers and after that to find the MIN) as I'm
going to refer to this sheet from a different sheet.

I'm trying
=MIN(IF(ISNUMBER(TRIM(LEFT(I2:I30,FIND("
/",I2:I30)))*1),TRIM(LEFT(I2:I30,FIND(" /",I2:I30)))*1)) but of course it's
not working.
Can anybody help me with it?

Thanks