Question

If a man sold an article for rupees 81 he would make 8% profit find the % profit or loss if sold for rupees 70.5

Answer 1

Let take cost price = x ,
 then by formula 
 S.P = ((100 - L%)/100)* C.P
 S.P = (80/100)* x = (4/5) x 
 
 Now if he sell 200 more,
 S.P = (4/5)x + 200

Profit will 5 % 
 S.P = ((100 + P% )/100) * C.P
 => (4/5)x + 200 = ((100 + 5)/100) * x
 25x = 20000
 x = 800
C.P is ₹ 800

Answer 2

the answer is 800....