wie kriege ich 20/84istel in 100stel?

Das machen wir mit einer Verhältnisgleichung:

20 / 84  =   x / 100        x = 20*100/84 = 23,81

$${\frac{{\mathtt{20}}{\mathtt{\,\times\,}}{\mathtt{100}}}{{\mathtt{84}}}} = {\frac{{\mathtt{500}}}{{\mathtt{21}}}} = {\mathtt{23.809\: \!523\: \!809\: \!523\: \!809\: \!5}}$$

20 / 84 = 23,81 / 100

  Probe :   20/84      =   $${\frac{{\mathtt{20}}}{{\mathtt{84}}}} = {\frac{{\mathtt{5}}}{{\mathtt{21}}}} = {\mathtt{0.238\: \!095\: \!238\: \!095\: \!238\: \!1}}$$

               23,81/100 =    0,2381

Gruß radix !