Question

5. A radio was sold for Rs 1600 at a loss of 20%. At what price must
it be sold to get 20% profit

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Answer 1

m.p - 20%of m.p = s.p

or, m.p - 20/100 × m.p  =1600

or, m.p - 0.2m.p=1600

or,0.8m.p=1600

or,m.p=1600/0.8

  m.p = Rs 2000

now,

profit = 20%

m.p = Rs 2000

again,

s.p = m.p + 20%of m.p

     = 2000 + 20/100 × 2000

     =2000+400

     = Rs 1600 ans

HOPE IT HELPED :)