How to Figure Out The Sale Price of Something Quickly in Your Head
Instructions
1Round the regular price to full dollars. If it's $8.95, round it to $9.00.
2
Figure out the "pay percent," which is the percent you actually pay. Sounds hard but it's very easy. Full price is 100%, right? Subtract the sale percent from 100 to get the pay percent. Example: If there's a sale for 20% off, then subtract 100-20=80. 80 is the pay percent, the percent you actually pay.
3
Multiply the regular price by the pay percent, and that's the sale price.
Let's try: regular price is $8.95, and it's on sale for 20% off. Round $8.95 to 9. Calculate pay percent to be 80 (100-20=80). Multiply 9x80=720 (9x8=72, so 9x80=720). The sale price is $7.20.