A worker's salary increases from $72000 to $81000. What is the percentage increase?

My scientific calculator gives me the answer 11.111%, but on online calculators the answer is 12.5% So what is the correct answer? :-)Code:`81000 - 72000 = 9000`

9000 / 81000 = 0.11111111

0.11111111 x 100 = 11.111%