131
C
h
ap
t
e
r
10
P
o
p
U
p
T
oo
l
s
a
0.
53 + 123 – 63 =
53
q
123
w
63
u
113.
963
!
(23 – 56) =
23
w
56
e
963
u
– 31’779.
(56
!
3 – 89)
÷
5.2 + 63 =
56
e
3
w
89
r
5.2
q
63
u
78.1923076923
1234567890
!
741852 =
1234567890
e
741852
u
E
915.866658332
C
915.866658332
a
0.
3
!
5 =
3
ye
5
u
8.6602540378
12 + 23 =
23
12
u
K +
35.
45 + 23 =
45
u
K +
68.
78 + 23 =
78
u
K +
101.
7
–
5.6 =
5.6
ww
7
u
K
–
1.4
2
–
5.6 =
2
u
K
–
–
3.6
2.3
!
12 =
12
ee
2.3
u
K
!
27.6
4.5
!
12 =
4.5
u
K
!
54.
45
÷
9.6 =
9.6
rr
45
u
K
÷
4.6875
78
÷
9.6 =
78
u
K
÷
8.125
12% of 1500
1500
e
12
t
180.
Percentage of 660 against 880
660
r
880
t
75.
15% add-on of 2500
2500
e
15
tq
2
’
875.
25% discount of 3500
3500
e
25
tw
2
’
625.
480
q
25
t
640.
w
160.
100
w
80
t
25.
80
!
9 = 720
{
80
e
9
|
M
720.
–
) 50
!
6 = 300
50
e
6
}
M
300.
20
!
3 = 60
20
e
3
|
M
60.
480
\
M
480.
What will the selling price and profit
be when the purchasing price of an
item is $480 and the profit
rate to the selling price is 25%?
If you made $80 last week and $100
this week, what is the percent
increase?
To perform calculations