Percentage Questions And Answers, deals with various concepts which are as under:-
- Convert Percent to Fraction
- Convert Percent to decimal
- Convert Ratio to Percentage
- Convert Fraction to Percent
- Convert Percentage to Ratio
- Finding a number, whose percentage value is given
- Net Increase or Decrease Percentage in a Number
- Finding a number when its decreased percentage is given
- Finding a number when its increased percentage is given
Percentage Questions And Answers – Convert Percent to Fraction
Step 1 – In order to convert Percent to Fraction, we divide the Percentage by 100, and remove the sign of Percentage (%).
Step 2 – Simplify the Fraction
Question 1:
Convert 40 % into a Fraction?
Solution:
In order to convert a Percentage into a Fraction, we divide the Percentage by 100, and remove the sign of Percentage (%).
We have,
40 % = 40/100
On Simplifying, 40/100
HCF of 40 and 100 is 20
Divide both 40 and 100 by their HCF
Percentage Questions And Answers –Â Convert Percent to decimal
In order to convert Percent to Decimal we have to perform the following steps:
Step 1 – Convert the Percentage into Fraction, by dividing the given Percentage by 100.
Step 2 – Convert the Fraction obtained at Step 1, into a Decimal form , by dividing numerator by Denominator.
Question 2:
Convert 12 % into a decimal.
Solution:
In order to convert given Percentage into into decimal we have to perform the following steps:
Step 1 – Convert the Percentage into Fraction, by dividing the given Percentage by 100
i.e, 12 % = 12/100
Step 2 – Convert the Fraction obtained at Step 1, into a Decimal form , by dividing numerator by Denominator
i.e, 12/100 = 0.12
Hence, 12 % = 0.12
Percentage Questions And Answers –Â Convert Ratio to Percentage
To convert Ratio to Percentage we have to follow following steps:
Step 1 – Convert the Ratio into Fraction.
Step 2 – Multiply the Fraction by 100 and put the Percentage sign to the result (%)
Question 3:
Convert 8 : 40 into a Percentage.
Solution:
To convert the given ratio into Percentage we have to follow following steps:
Step 1 – Convert the ratio into Fraction
8 : 40 = 8/40
Step 2 – Multiply the Fraction by 100 and put the Percentage sign to the result (%)
( 8/40 x 100 ) %
On solving the given Fraction, we get,
= 20 %
Percentage Questions And Answers –Â Convert Fraction to Percent
To convert Fraction to Percent, we need to multiply the Fraction by 100, and assign the Percentage (%) sign to it.
Question 4:
Convert 23/100 into Percentage.
Solution:
To convert a Fraction into Percentage, we need to multiply the Fraction by 100, and assign the Percentage (%) sign to it.
that is, ( 23/100 x 100 ) % = 23 %
Percentage Questions And Answers –Â Convert Percentage to Ratio
Step I –Â In order Convert Percentage to Ratio, we need to divide the given percentage by 100.
Step IIÂ – Reduce the Fraction obtained in Step I into its Simplest form.
Step III –Â Convert the Fraction ( obtained in step II ) into Ratio by replacing the slash mark with a colon.
Question 5:
Express 8 % as a ratio.
Solution:
In order to express a Percentage as a ratio, we need to write
Percentage Questions And Answers –Â Finding a number, whose percentage value is given
Question 6:
If 35 % of a number is 105, find the number?
Solution:
We can form a linear equation to express the given statement and then arrive at the number
Let the required number be x
We are given that
35 % of x is 105
or in other words
35/100 × x = 105
On cross multiplication, we get
x = (105×100)/35
x = 300
Hence, the number is 300
Percentage Questions And Answers –Â Net Increase or Decrease Percentage in a Number
Question 7:
A number is increased by 20 % and then decreased by 15 %. The net increase or decrease percentage is?
Solution:
We can form a linear equation to express the given statement and then arrive at the number
Let the required number be “a”
Step I:
If the number is increased by 20 % it would be equal to ( Given Number + 20 % of Given Number )
Step II:
If the number at Step 1 is decreased by 15 % it would be equal to ( Increased Number – 15 % of Increased Number )
= 2 %
Hence, Net Increase Percentage is = 2 %
Percentage Questions And Answers –Â Finding a number when its decreased percentage is given
Question 8:
A number when decreased by 15 % gives 170. The number is?
Solution:
Here we take the help of linear equation. First we will form the equation.
Let the number be ‘a’
15 % of ‘a’ = (15/100)a
Since, the equation is:
a – (15/100)a = 170
Taking 100 as LCM on LHS
Hence, the number is 200
Percentage Questions And Answers –Â Finding a number when its increased percentage is given
Question 9:
A number, when increased by 50% gives 150. The number is?
Solution:
The problem can be solved using linear equation.
Let the number be ‘a’
50% of a = (50/100)a
We are given that, a + (50/100)a = 150
Taking 100 as LCM on LHS
Hence, the number is 100