Casio fx 991MS User Guide - Page 16

Percentage Calculations

Get Casio fx 991MS - Scientific Display Calculator PDF manuals and user guides
UPC - 079767134860
View all Casio fx 991MS manuals
Add to My Manuals
Save this manual to your list of manuals

Page 16 highlights

• An error occurs if you try to input a mixed fraction while the d/c display format is selected. k Percentage Calculations • Example 1 : To calculate 12% of 1500 (180) 1500 - 12 A v • Example 2: To calculate what percentage of 880 is 660 (75%) 660 \ 880 A v • Example 3 : To add 15% onto 2500 (2875) 2500 - 15 A v + • Example 4 : To discount 3500 by 25% (2625) 3500 - 25 A v , • Example 5: To discount the sum of 168, 98, and 734 by 20% (800) 168 + 98 + 734 = g A j 1 p 1 - 20 A v , * As shown here, if you want to use *the current Answer Memory value in a mark up or discount calculation, you need to assign the Answer Memory value into a variable and then use the variable in the mark up/discount calculation. This is because the calculation performed when v is pressed stores a result to Answer Memory before the , key is pressed. • Example 6: If 300 grams are added to a test sample originally weighing 500 grams, what is the percentage increase in weight? (160%) 300 + 500 A v • Example 7: What is the percentage change when a value is increased from 40 to 46? How about to 48? (15%, 20%) 46 , 40 A v e e e e e e 8 = 14

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
14
•
An error occurs if you try to input a mixed fraction while
the d/c display format is selected.
k
Percentage Calculations
•
Example 1:
To calculate 12% of 1500
(180)
1500
-
12
A
v
•
Example 2:
To calculate what percentage of 880 is 660
(75%)
660
\
880
A
v
•
Example 3:
To add 15% onto 2500
(2875)
2500
-
15
A
v
+
•
Example 4:
To discount 3500 by 25%
(2625)
3500
-
25
A
v
,
•
Example 5:
To discount the sum of 168, 98, and 734 by
20%
(800)
168
+
98
+
734
=
g
A
j
1
p
1
-
20
A
v
,
* As shown here, if you want to use the current Answer
Memory value in a mark up or discount calculation, you
need to assign the Answer Memory value into a variable
and then use the variable in the mark up/discount
calculation. This is because the calculation performed
when
v
is pressed stores a result to Answer Memory
before the
,
key is pressed.
•
Example 6:
If 300 grams are added to a test sample
originally weighing 500 grams, what is the percentage
increase in weight?
(160%)
300
+
500
A
v
•
Example 7:
What is the percentage change when a value
is increased from 40 to 46? How about to 48?
(15%, 20%)
46
,
40
A
v
e
e
e
e
e
e
8
=
*