You want to buy something that costs $129, and it's on sale for 80% off. What is the item's sale price?
First, convert the 80% to a real mathematical number. For percent's, this is always done by dividing the 80% by 100%, or 80% / 100% = 0.800.
Second, find out what 80% of $129 is. This is the amount of the sale discount. This is always found by multiplying 0.800 by the item's cost $129, like this:
0.800 x $129 = $103.20.
So for this sale, you'll save $103.20 on this item.
This means, the cost of the item to you is
$129 - $103.20 = $25.80.
Before Price: $129.00
Discount %: 80%
Answer =====> Sale Price: $25.80 would be the sale price of the bicycle.
Amount Saved: $103.20
Alternatively, you can think about it this way.
The item is 80% off. This means you'll pay 20.000% of the total cost (100% - 80% = 20.000%).
Now what's 20.000% of the total cost?
0.200 x $129 = $25.80.
Just like the result above, the sale price on the item is $25.80.
Hope that helps!!!!!! : )