This works
1 apply custom number format as in post#1
Range Number Custom Format: [=0]"N/A";[<1]##.0%;###%
2 add NEW CF rule (to insert + before positive numbers)
if value > 0
Number Format \ custom format : [<1]+##.0%;+###%
3. add NEW CF rule (to amend negative number font colour to red)
if value < 0
Format \ Font \ and set Colour selection to: RED
Althouigh not visible in the extract below, my worksheet also shows the Red \ Green CF icons in each cell
Excel 2016 (Windows) 32 bit
[TABLE="class: head"]
<tbody>[TR="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]
[TH][/TH]
[TH]E[/TH]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]2
[/TD]
[TD]+494%.
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]3
[/TD]
[TD]-323.3%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]4
[/TD]
[TD]-322.1%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]5
[/TD]
[TD]+23.5%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]6
[/TD]
[TD]-93.6%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]7
[/TD]
[TD]-310.5%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]8
[/TD]
[TD]-257.0%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]9
[/TD]
[TD]+45.7%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]10
[/TD]
[TD]-245.3%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]11
[/TD]
[TD]+69.1%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]12
[/TD]
[TD]+334%.
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]13
[/TD]
[TD]-196.8%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]14
[/TD]
[TD]+198%.
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]15
[/TD]
[TD]-242.0%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]16
[/TD]
[TD]-160.7%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]17
[/TD]
[TD]-60.9%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]18
[/TD]
[TD]+155%.
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]19
[/TD]
[TD]-56.4%
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]20
[/TD]
[TD]+243%.
[/TD]
[/TR]
[TR]
[TD="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=E0E0F0]#E0E0F0[/URL] "]21
[/TD]
[TD]-18.4%
[/TD]
[/TR]
</tbody>[/TABLE]
[TABLE="class: grid"]
<tbody>[TR]
[TD]Sheet:
Sheet1[/TD]
[/TR]
</tbody>[/TABLE]