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Percentage
Example: 20% of 720 is 144.
Add-On
Example: 30% added to 540 is 702.
Discount
Example: 800 discounted by 20% is 640.
You Press You See
720
×
××
×
20 %
144.
You Press You See
540 + 30 %
702.
You Press You See
800 – 20 %
640.
Radio Shack EC-2037 Calculator User Manual