percentage Questions for practice

By -
Trick ( x + y +xy/100)
1- A person earns a profit of 25% in his business in first year and earns 42% in second year.
what is the percentage change in his profit at the end of second year.
A. - 77.5
2- Tia's salary increased by 25% in first year and decreased by 10% in second year.
What is the percentage change in her salary at the end of second year.
A. - 12.5

Comments

  1. Amit Kothiyal19 February 2012 at 11:46

    Given trick don't work on second question??

    ReplyDelete
    Replies
    1. Javed Hasan19 February 2012 at 21:15

      in second question salary is increased and then decreased so u can use x+y-xy/100

      Delete

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