kann hier jemand helfen ?

$66,95+2,13$%

$66,95+\frac{2,13}{100}*66,95=66,95+0,0213*66,95=68,38$

oder

$1,0213*66,98=68,38$

66,98+2,13 % =

${\color{red}66,98+2,13\%}\\ =66,98\times \frac{100+2,13}{100}\\ =66,98\times\frac{102,13}{100}\\ \color{blue}=68,406674$

  !