The Percent Key
The% key has two functions:
Finding a Percentage grade calculator. In most cases, % divides a number by 100.
The one exception is when a plus or minus sign precedes the number.
(See Adding or Subtracting a Percentage, below.)
For instance, 25 % results in 0.25.
To find 25% of 200, press: 200 * 25 % =. (Result is 50.)
Adding or Subtracting a Percentage. You can do this all in one
For instance, to decrease 200 by 25%, just enter 200 - 25 % =.
(Result is 150.)
Example: Calculating Simple Interest. You borrow $1,250 from a
relative, and agree to repay the loan in a year with 7% simple interest.
How much money will you owe?
Keys: Display: Description:
1250 + 7 % Interest on the loan is $87.50.
= 1,337.50 You must repay this amount at the end of one year.