Percentage Problems for SSC CGL

6.

In expressing a length of 81.472 km as nearly as possible with the three significant digits, find the percentage error

   A.) 0.35%
   B.) 0.34%
   C.) 0.034%
   D.) 0.035%

Answer: Option 'C'

Error = (81.5 - 81.472) = 0.028
Required percentage = (0.028/81.472) x 100 = 0.034%

7.

Total number of boys and girls in a school is 150. If the number of boys is x, then girls become x% of the total number of students. The number of boys is

   A.) 50
   B.) 60
   C.) 70
   D.) 80

Answer: Option 'B'

x% of 150 = 150 - x [as x is number of boys]
=> x + (x/100) × 150 = 150
=> (5/2)x = 150
=> x = 60

8.

Three candidates contested an election and received 1136, 7636 and 11628 votes respectively. What percentage of the total votes did the winning candidate got

   A.) 55%
   B.) 56%
   C.) 57%
   D.) 58%

Answer: Option 'C'

Total number of votes polled = (1136 + 7636 + 11628) = 20400
So, Required percentage = 11628/20400 * 100 = 57%

9.

Half of 1 percent written as decimal is

   A.) 5
   B.) 0.5
   C.) 0.05
   D.) 0.005

Answer: Option 'D'

It will be 1/2(1%) = 1/2(1/100) = 1/200 = 0.005

10.

88% of 370 + 24% of 210 - x = 118

   A.) 150
   B.) 250
   C.) 158
   D.) 258

Answer: Option 'D'

258

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