Percentage
In Quantitative Aptitude, Percentage
is defined as a number or ratio which can be expressed as a fraction of 100 or
a fraction whose denominator is 100 is called a percentage & the numerator
of the fraction is called the rate percent.
Concept of Percentage:
Kamal saves 20% of his monthly
income means – Kamal saves Rs.20 out of every Rs.100 of his income.
- To
calculate x% of y -
(x/100) * y = (x*y)/100
- x%
of y = y% of x
- Percentage
change in value = {change/(initial
value)} * 100
- Increase
A by x%= A(1 + x/100)
- Decrease
A by x% = A(1 – x/100)
- If
Y is x% more /less than Z, then Z is 100x/(100 + x) % less/more than Y
- Successive
Percentage Change -
If there are successive percentage increases of x % and y%, the effective
percentage increase is: {(x + y + (xy/100)}%
Concept of
Percentage
Percentage and Percent are related closely to each
other. Percent (%) is accompanied with a specific number.
Example - More than 80% of the
students who took ADDA247 test series qualified the RBI Assistant prelims
2020. Percentage is represented without a number, is used
generally for general case of percent.
Example: The percentage of the
population affected by coronovirus is between 20% and 25%.
Tricks Related To Percentage:
Fraction, Ratio, Percent and Decimal
are interrelated with each other. The conversion table will serve as a shortcut
trick to solve various questions.
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