1) First, establish the cost of the item. (Say, two units of whatever.)
2) Divide that amount in half. (That would be one unit of whatever.)
3) Add the second part to the first part. (The sum becomes three units of whatever.)
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Usually means if you buy one at the regular price you get the second one at 50% or half off the regular price. The idea is to get you to buy more than one of something. So, if the regular price for something is $10, the deal is if you buy one for $10 you get the second one for $5, or half off.
The statement that represent that is one - half a number is 267.
This is not an equation. 0.5 can also be represented as a fraction, 1/2 (one half)
i know payless has it but who actually invented it?
1/2