A shopkeeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of the cost price to the printed price is:
Answer & explanation
Correct answer: option 2
CP MP
100 - D% 100 + P%
100 - 10% 100 + 12%
90 112
CP : MP = 90 : 112 = 45 : 56