Example 4

Calculate the percent change between 55 and 32 and store it as a constant. Then calculate the percent change between 50 and 32, and 45 and 32.

Table 4-4 Calculating percent change

KeysDisplay Description

VV\¨DGª

32.00

Stores % change 32 as constant.

 

 

 

 

4

-41.82

Calculates the % change

 

between 55 and 32.

 

 

 

V:4

-36.00

Calculates the % change

 

between 50 and 32.

 

 

 

YV4

-28.89

Calculates the % change

 

between 45 and 32.

 

 

 

All of the other two-number functions on the calculator may be used with ªin the same

manner as shown in example 4. For a complete list of two-number functions, refer to the section titled, Two-Number Functions in chapter 2.

Using the M Register

The s, p, and mkeys perform memory operations on a single storage register, called the M register. In most cases, it is unnecessary to clear the M register, since s replaces the previous contents. However, you can clear the M register by pressing :s.

To add a series of numbers to the M register, use sto store the first number and mto add subsequent numbers. To subtract the displayed number from the number in the M register,

press yfollowed by m.

Table 4-5 Keys for performing memory operations

KeysDescription

s

Stores displayed number in the M register.

 

 

 

p

Recalls number from the M register.

 

 

 

m

Adds displayed number to the M register.

 

 

 

Number Storage and Storage Register Arithmetic 51