cost price of 30 books is equal to the selling price of 24 books.find the gain percent
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let cost price be x and selling price be y
30x=24y
y=30/24*x
y=5/4*x
Now profit =s.p-c.p
put the value of a.p and c.p
5/4x-x=(5x-4x)/4
=x/4
for % multiply by 100
x/4*100
=25%of cp
30x=24y
y=30/24*x
y=5/4*x
Now profit =s.p-c.p
put the value of a.p and c.p
5/4x-x=(5x-4x)/4
=x/4
for % multiply by 100
x/4*100
=25%of cp
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