Two numbers are respectively 20 and 30 of third numbers. what percentage is the first of the second

Two numbers are respectively 20 percent and 50 percent of a third number. What percent is the second of the first?

Let the third number be 100∴ The first number = 20% of 100= `(20)/(100) xx 100` = 20and the second number = 50% of 100= `(50)/(100) xx 100`= 50∴ The second no. as the present of the first= `(50)/(20)xx 100%`

= 250%

Concept: Concept of Percent and Percentage

  Is there an error in this question or solution?

Page 2

Two numbers are respectively 30 percent and 40 percent less than a third number. What percent is the second of the first?

Let the third number = x
∴ First number = `x - (30x)/(100)`

= `(100x - 30x)/(100)`

= `(70x)/(100)`

= `(7x)/(10)`

Second number = `x - (40x)/(100)`

= `(100x -40x)/(100)`

= `(60x)/(100)`

= `(6x)/(10)`

∴ Required % = `((6x)/(10))/((7x)/(10))xx 100`

 = `(6x)/(10) xx (10)/(7x) xx 100`

= `(600)/(7)`

= 85`(5)/(7)%`

Concept: Concept of Percent and Percentage

  Is there an error in this question or solution?

SSC GD Constable Vacancies Increased from 24369 to 45284. Earlier, the SSC GD Constable Exam Dates were out for the 2022 cycle. The exam will be conducted from 10th January 2023 to 14th February 2023. The candidates who will be appearing in exam must attempt SSC GD Constable Previous Year Papers. The vacancies have been released for the recruitment of GD Constables in various departments like BSF, CRPF, CISF, etc. Candidates applied for SSC GD Constable 2022 till 30th November 2022. Applicants must note that they can apply for this recruitment only through the official website. The SSC GD Constable Exam Pattern has also been changed.