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HP HP-67 User Manual

HP HP-67
364 pages
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Function
Keys
91
For
example,
to
calculate
a
sales
tax
of
6.5%
on
a
purchase
of
$1500:
Press
Display
1500
1500.00
Base
number.
6.5
Percent
rate.
0
97.50
The
answer.
6.5%
of
$1500
is
$97.50.
In
the
above
example,
when
£
is
pressed,
the
calculated
answer
writes
over
the
percentage
rate
in
the
X-register,
and
the
base
number
is
preserved
in
the
Y-register.
When
you
pressed
[
the
stack
contents
were
changed...
...from
this...
...to
this.
T
0.00
T
0.00
Zz
0.00
z
0.00
Y
1500.00
Y
1500.00
X
6.5
X
97.50
Since
the
purchase
price
is
now
in
the
Y-register
and
the
amount
of
tax
is
in
the
X-register,
the
total
amount
can
be
obtained
by
simply
adding:
Press
Display
1597.50
Total
of
price
and
sales
tax
combined.
Percent
of
Change
The
(percent
of
change)
key
is
a
two-number
function
that
gives
the
percent
increase
or
decrease
from
Y
to
X.
To
find
the
percent
of
change:
1.
Key
in
the
base
number
(usually,
the
number
that
happens
first
in
time).
2.
Press
E0ELD,
3.
Key
in
the
second
number.
4.
Press
B
(%cH),

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HP HP-67 Specifications

General IconGeneral
BrandHP
ModelHP-67
CategoryCalculator
LanguageEnglish

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