Automatic Calculating % for a row of numers of the total vaule

[Stuart Millner]

I need to calculate a % of what each number is against the total without
doing it manaually.

[Vito]

=A1/$A$100 formatted as percent and copied down, where A100 contains the total and A1 to A.... contain the numbers to divide by the total.

The $'s "freeze" the cell so that the other cells are always compared with that one cell reference.

Adjust cell references to suit your locations.