I just bought a Casio SL-1100TV calculator - just a basic calculator. It has a tax rate feature (two tax buttons next to the % button). The problem is the rate the ''%'' key is set at give's incorrect ''%'' calculations. For example, if I type in 100 - 20% it calculates ''400''. I've followed the manual in adjusting the default ''tax rate'' for the percentage button to ''0'' but it's still not calculating correctly. Any ideas?
FINALLY figured out how to change the tax rate! Press AC. Press and hold the Rate Set (%) button UNTIL THE CURRENT TAX RATE IS DISPLAYED. Enter the new rate you want (such as 7.5). Press the Rate Set (%) button again.
SOURCE: my calculator will not let me add or subtract percentages.
It would appear most Casio’s have a similar problem I believe this could be a fault in their programming and am awaiting reply from Casio and some of its distribution outlets.
SOURCE: change tax rate oncalculator
Press the [ac] button, then press and hold the [tax+] button for a second or two. Then enter the tax rate you want as a percentage. You would enter 8.25% sales tax as 8.25 for instance. Then press the [%] key to set the rate. Notice that printed above the [tax+] button is "tax rate" and above the [%] key is "rate set" as a reminder of which key to press.
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