what is 20% off 1,928 dollars

Two ways:

 

1928 - 20% (1928) = 1928 - 20/100 (1928) = 1928 - 385.6 = $ 1542.40

 

or ,  since you are removing 20% you hav 80% left:

  1928 x 80/100 = 1928 x .8 = $ 1542.40