Ecuestre una fracción cuya denominador sea potencia de 10 (10, 100, 1000 o mayor ).​

When we say an amount increased by some percentage, we usually mean that percentage is added to the original amount. In symbols, if there were V visitors in 2003, then in 2005 there were
  V + 200%×V = 3V
visitors. And in 2007 (after 2 more years), there were
  3(3V) = 9V
visitors. This represents an increase of
(9V -V)/V × 100% = 800%

The number of daily visitors in 2007 was 800% more than in 2003.