Question

The marked price of a mobile phone is Rs8000 A shopkeeper sells it a discount of 20% and earns a profit of 25% find the cost of the mobile phone

Answer 1

m.p=8000
%d=20%
s.p=
$8000 \times 8 0 \div 100 =$
6400
c.p=
$6400 \times 4 \div 5$
=8000

Answer 2

mp=8000
d%=20
d =8000×20%=1600
sp=8000_1600=6400

let the cp be 100
p%=25
p=25
sp=125
if so is 125 , cp is 100
if sp is 1 , cp is 125÷100
if sp is 6400,cp is 125÷100×6400=8000