Example
1:
Height
of arun is 50% greater than the height of amir khan. Height of amir khan is how
much per cent less than that of arun?
Solution:
+50% = 1/2
Amir khan
---------------------------> Arun
<----------------------------
-33.33% =
1/3 = 1/2+1
thus the
height of amir is 33.33% less than arun
Example
2:
Due to
irregular working habits of ramachandran his salary was reduced by 20% but
after same month his salary was increased to the original salary. What is the
percentage increase in salary of ramachandran?
Solution:
Let
initial salary be rs.100
-20%
100
-------------------> 80
<-------------------
+25%
Example
3:
Kajolu
usually wear saree, which is 16.66% less than the actual length of the saree.
By how much per cent the actual length of the saree is greater than the length
of saree which kajol usually wears?
Solution:
Actual length Usual
length
-16.66%
= 1/6
-------------------------à
A---------------------àUß-------------------
+20%
= 1/5 = (1/6-1)
So the actual length of the saree is 20% greater
than the usually used saree
Example
4:
Initially
mr. rakhi sawant has rs. 200 in her wallet then she increased it by 20%. Once
again she increased her amount by 25%. The final value of money in her wallet
will be how much percent greater than the initial amount.
Solution:
+20% +25%
200 --------------------à
240 -----------------------à 300
So the required % increase = 300-200/200 x 100 = 50%
Example
5:
The
age of B is 50% greater than the age of A. The age of C is 20% less than the
age of B. By how much percentage the age of C is greater than the age of A.
Solution:
+50% -20%
A -----------------------à
B-----------------------------àC
100 150 120
So the required percentage change = 20/100 x 100
= 20%
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