First of all friends very sorry for keep u all waiting as I
was busy preparing wonderful notes for you.
The topic that we gonna startup with is “PERCENTAGES” which
is very very crucial in dealing with DI questions and Quants part as well. So
LETs start:
CONVERSION OF
PERCENTAGE TO FRACTION: To
convert percentage into fraction we need to remove the percentage sign and
divide that quantity by 100. For eg:
45%= 45/100 20%= 20/100 10%= 10/100
CONVERSION OF FRACTIONS TO PERCENTAGE: You just need to multiply the fraction
by 100. For eg:
1/4 = ¼ *100= 25% 1/2
=1/2 *100= 50%
LEARN THE FOLLOWING TABLE BY HEART FOR FASTER
CALCULATIONS (FRACTIONS/ PERCENTAGE)
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FRACTION
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1/2= 50%
|
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1/3 = 33.33%
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2/3 =66.67%
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¼ =25%
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2/4=50%
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¾=75%
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1/5=20%
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2/S=40%
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3/5=60%
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4/5=80%
|
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1/6=16.67%
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2/6=1/3=33.33%
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3/6=1/2=50%
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4/6=2/3=66.67
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5/6=83.33%
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1/7=14.28%
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2/7=28.56%
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3/7=42.84%
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4/7=57.12%
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5/7=71.40%
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1/8=12.5%
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1/9=11.11%
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1/10=10%
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1/11=9.09%
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1/12=8.33%
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1/13=7.69%
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1/14=7.28%
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1/15=6.67%
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1/16=6.25%
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1/17=5.88%
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1/18=5.55%
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1/19=5.26%
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1/20=5%
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**I have converted all the fractions to percentage by
multiplying 100 to them.
You all may be thinking that this is not useful data but I’ll
explain you the importance of this via different questions.
Q1) Find:
1)
33.33% of 84 2)
66.67% of 90 3)42.84% of 91 4) 57.12% of 70.
Do not try
conventional way of finding the percentage problem like 33.33% of 84 can be
calculated as (33.33/100)*84 which is very time consuming job and yield very
complex result.
Solution:
From the above table we know the percentage values in
fraction that is:
33.33%= 1/3 66.67%=
2/3 42.84%= 3/7 57.12%=4/7
1) 33.33% of 84 = 1/3 * 84=28
2)66.67% of 90= 2/3 *90=60
3)42.84% of 91= 3/7 * 91= 39
4)57.12% of 70= 4/7 * 70= 40
From above we can see that how easy is this to find the
percentages by converting them into fractions.
So learn the table as much as you can for maximum types of
percentages values so that you can solve problems in seconds which matters the
most I guess.
EXERCISE:
EVALUATE:
1)15.78% OF 57 2)23.52% OF 51 3) 46.15% OF 91 4)68.75%
OF 32 5)87.5% OF 96
6) 81.81% OF 110 7)
28.57% OF 70 8) 44.44% OF
99 9) 2.67% OF 60
10)38.88% OF 180
BELOW
MENTIONED IS THE BAR GRAPH REPRESENTING THE PRODUCTION OF 3 TYPES OF CARS IN
THOUSANDS IN 2010, 11, 12, 13. Answer the following questions
Q1) What is the percentage increase in the production of car
A from 2010 to 2011?
Q2) What is the percentage decrease in the production of the
car B from 2010 to 2013?
Q3) By what percentage the production of car B in 2012 is
less than that of cumulative production
of CAR A and C?
Q4) By what percentage the production of car A is less than
that of total production of all the cars in all the years?
That’s all
for today. Hope you will do whatever I have recommended. I am gonna post more
questions in the meanwhile to keep you in touch with this topic.
