As you can see in the image or formula below, I am writing a series of formulas that are referencing the sheet "Lulu." Instead of rewriting "Lulu" over and over, I would like to write Lulu once in cell B1 and reference cell B1 inside the formula.
=AVERAGE(LULU!$C$4:$C$5)/AVERAGE(LULU!$D$4:$D$5)-1