Because the second discount refers to the already-discounted price,
not to the original full price.
Example:
-- The item was originally priced at $100.
-- It was discounted 20%, and that brought its price down to $80.
-- If it's discounted again later, then the second 20% discount will be 20% of $80,
not 20% of $100.
20% of $80 is $16, so the second discount will reduce the price to $64.
-- If it had been reduced from $100 all the way to $64 in one cut the first time,
that discount would have been 36% .
$7.65 $10 * 15% = 1.5 10-1.5= 8.5 $8.5 x 10% = .85 8.5 - 0.85 = 7.65
16
10.50 off 94.5 on
20%
The item will cost 170.00
$7.65 $10 * 15% = 1.5 10-1.5= 8.5 $8.5 x 10% = .85 8.5 - 0.85 = 7.65
Yes
16
30 percent off of 77 plus 7 percent tax = 57.67
10.50 off 94.5 on
20%
The item will cost 170.00
5 dollars
$97.75
5.00
$30 off, which makes the item $20.
You'll save $14.85 on this item. This means, the cost of the item to you is: $99.00 - $14.85 = $84.15