Question

if 30% of A is added to 40% of B the answer is 80% of B . what percentage of A is B ?

Answer 1

 A * 30 + B * 40 = B * 80
             100       100         100
      => A * 30 = B * 80 - B * 40
               100          100       100

     =>A * 30 = B * 40       
              100        100
    =>3A = 4B
Required percent = 3/4 * 100 = 75%  


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Answer 2

Mark this answer as brainliest answer