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Title: Financial Maths
Description: Notes about calculating the interest and mark up and discount prices.
Description: Notes about calculating the interest and mark up and discount prices.
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Math No
otes
Chap
pter 1 Financial Maths
1
...
as a de
ecimal
...
35
You could also
o write
62
6
Increasin
ng or decrea
asing by a giv
ven percenta
age
A percen
ntage can als
so represent
t a change in a quantity
...
Multiplier
Multiplie
er for Increase = 100% + %Increase
Y
You then nee
ed to conver
rt
to a de
ecimal
Multiplie
er for Decrea
ase = 100% ‐
‐ %Decrease
New
w Amount
t = Multiplier × O
Old Amou
unt
Writing one amount
t as a percentage of anot
ther
e one amoun
nt as percentage of anoth
her first mak
ke sure they a
are in the sa me unit
...
...
1
...
It is usually expressed as
s a percentage
...
Multiplie
er for Decrea
ase = 100% ‐
‐ %Decrease
New
w Amount
t = Multiplier × O
Old Amou
unt
Profit an
nd Loss
The man
nufacturers a
and retailers need to ma ke a profit
...
They w
will
then add
d on a mark up to obtain
n the selling price
...
If the selling price is less than the
Profit or
r loss can be expressed as percentage
e of the cost
t price or the
e selling price
e
...
We can us
se the multip
plier for incre
easing an am
mount
...
To find t
New Am
mount = Mult
tiplier × Old A
Amount
New Amou
unt
Old Amo
d
ount
Mul
ltiplier
r
Title: Financial Maths
Description: Notes about calculating the interest and mark up and discount prices.
Description: Notes about calculating the interest and mark up and discount prices.