Hallo Anonymous,
1.) $${\mathtt{3\,000}}{\mathtt{\,\small\textbf+\,}}{\mathtt{19}}\% = {\mathtt{3\,570}}$$
2.) 100 % + 19 % = 119 % = 119/100 = 1,19
$${\mathtt{3\,000}}{\mathtt{\,\times\,}}{\mathtt{1.19}} = {\mathtt{3\,570}}$$
3.) 19% von 3000 = 3000*19% = 3000*19/100 = 3000*0,19
= $${\mathtt{3\,000}}{\mathtt{\,\times\,}}{\mathtt{0.19}} = {\mathtt{570}}$$
3000 + 570 = 3570
Gruß radix
!