(02 Mar 2015, 7:55 pm)Dan wrote Formulae complicated enough to make you scratch your head!
=IF(D15=0,"%",D15/D$10)
=IF('REPORT xx Hr'!E13>0,'REPORT xx Hr'!E13/'REPORT xx Hr'!E81,0)
That's the easy stuff that, man.
Second line just looks more complicated because of the references to another sheet.