Current location - Training Enrollment Network - Mathematics courses - Math problem A box of biscuits with a price of 18 yuan can earn 20% of the original price if sold at a 20% discount. What's the purchase price of this box of biscuits?
Math problem A box of biscuits with a price of 18 yuan can earn 20% of the original price if sold at a 20% discount. What's the purchase price of this box of biscuits?
18×80%÷( 1+20%)
= 18×0.8÷ 1.2
= 14.4÷ 1.2
= 12 (yuan)
A: The purchase price of this box of moon cakes is 12 yuan.