tetris goes from $7.99 -> $5.99 in the app store it says "For a limited time, Tetris will sell for 40% off." more like 25% off (approximately) these people are blithering idiots **useless thread, I know**

"You want to buy something that costs $9.99 (from this to $7.99 to now $5.99), and it's on sale for 40% off. What is the item's sale price? First, convert the 40% to a real mathematical number. For percents, this is always done by dividing the 40% by 100%, or 40% / 100% = 0.400. Second, find out what 40% of $9.99 is. This is the amount of the sale discount. This is always found by mulitplying 0.400 by the item's cost $9.99, like this: 0.400 x $9.99 = $ 4.00. So for this sale, you'll save $ 4.00 on this item. This means, the cost of the item to you is $9.99 - $ 4.00 = $ 5.99. Alternatively, you can think about it this way. The item is 40% off. This means you'll pay 60.000% of the total cost (100% - 40% = 60.000%). Now what's 60.000% of the total cost? 0.600 x $9.99 = $5.99. Just like the result above, the sale price on the item is $5.99." By the way, I'm not a math genius so I didn't do any of this. I got it from here: http://www.webmath.com/cgi-bin/sale.cgi?param0=7.99¶m1=40&back=sale.html The bold means I put it there and it wasn't there in the first place.