60% off $100 = $40. You save $60.
Equation: $100 − (60% × $100) = $100 − $60 = $40.
Another way to read it: you pay 40% of the original price — that's $40.
$40. The discount is $60 and the final price you pay is $40.
You pay $40 (before tax). That's $100 minus a $60 discount.