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Enter 1st number in A1 Enter 2nd number in A2 In A3 enter =(1-A2/A1)*100 Or you can enter in A3 =(1-A2/A1) and format cell as number percentage
(a1+a2+....+am )2
=AVERAGE(A1:A34)
=($A$1+B1) Putting a dollar sign, as shown on the left, turns the A1 cell into a constant value. Any value in the A1 cell will be unchanged no matter where the formula may be copied and pasted on the spreadsheet.
n/(1/a1+1/a2+....+1/an)