General Operating Instructions
For example,
 Enter:  See Displayed:  
 
300 SAVE  14 %   $
  42.00
  percentage
 
–   $
  342.00
  net amount (base plus percentage)
or,
 Enter:  See Displayed:  
 
300 SAVE  14 %   $
  42.00
  percentage
 
+   $
  258.00
  net amount (base less percentage)
Finding Percent Difference Between Any Number and the Base: To find the percent difference between two numbers, enter the base number and press SAVE . Enter the second number, press   % (Δ%). For example,
 Enter:  See Displayed:  
 
60 SAVE  240   %   
  300.00
  % (240 is 300% greater than 60)

Raising a Number to a Power (Exponentiation)

The yX key lets you raise a positive number to any power automatically. In many calculators you’d have to perform the serial calculation multiplying the base number a number of times equal to the exponent (if you could do it at allJ). That is, 8 × 8 × 8 × 8 × 8 × 8 means 86. To make it easier, we have you enter the base number, press SAVE , enter the value of the power to which the base number is to be raised, press yX and the result is displayed. For example, to find the value of 86,
 Enter:  See Displayed:  
 
8 SAVE  6 yX  
  262144.00
   
To find the value of 2–5
 Enter:  See Displayed:  
 
2 SAVE  2.5 CHS yX   
  0.18
   
Note the blurred display, as opposed to blinking, during the calculation. This indicates the calculator is busy, and occurs when performing yx or other functions in the HP-80 which use yx.
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