HP 33S - Percentage Calculations

ALG: Summary
C–3
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
To Calculate: Press: Display:
12
3
12
)
3
Ï


64
1/3
(cube root) 3
'
64
Ï




Percentage Calculations
The Percent Function. The
m
key divides a number by 100. Combined with
Ù
or
Ã
, it adds or subtracts percentages.
To Calculate: Press: Display:
27% of 200 200
¸
27
m Ï


200 less 27% 200
Ã
27
m Ï


12% greater than 25 25
Ù
12
m Ï



To Calculate Press:
x% of y y
¸
x
m Ï
Percentage change from y to x. (y
≠
0) y
º p
x
Ï
Compare these keystrokes in RPN and ALG modes:
RPN Mode ALG Mode
27% of 200 200
Ï
27
m
200
¸
27
m
Ï
200 less 27% 200
Ï
27
m Ã
200
Ã
27
m
Ï
Example:
Suppose that the $15.76 item cost $16.12 last year. What is the percentage
change from last year's price to this year's
?