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perl - How do I print the '%' character with 'printf'?

Simple problem that I can't figure out...

How can I print a '%' character within a printf string? The code below prints it, but gives an 'invalid conversion' error as well.

printf "".$hour."00 HRS=>%.2f%.2f%.1f\%
", $total, $max15, ($max15/$total*100);

Should output something like:

        0000 HRS    =>    3125.19    898.02    28.7%
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You would use %%, not \% (from man printf)


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