Maths ?

Just noticed this at the BBC

“7. The “tiffin carriers” of Bombay, who deliver home-cooked lunches to office workers, are so good at delivering to the right person on time that Forbes Magazine has given them an accuracy and precision rating of 99.99% – one error per eight million deliveries.”

99.99% = 1 error in 8, 000, 000 ?

Surely that is 1 error in 10,000 ?