50% off 80 dollars = 40 dollars.
40 dollars
40% off $50 = $50 - (0.4 x $50) = $30
50 dollars - 40% = 60% [left] of 50 dollars = 50*60/100 = 30 dollars.
20 dollars
40 dollars.
50 dollars is.
50% off of 400 dollars is 200 dollars
25% off of 50 dollars = 75% of 50 dollars = 50*75/100 = 37.50 dollars
50% off of 40= 50% discount applied to 40= 40 - (50% * 40)= 40 - (0.50 * 40)= 40 - 20= 20
20% off of 50 = 40
6 dollars