Math: Wang Jun bought a book with a 15% discount, which is cheaper than the original price. 8 yuan, what is the original price of this book? A commodity is sold at a 20% discount, which is 84% cheaper
Math: Wang Jun bought a book with a 15% discount, which is cheaper than the original price. 8 yuan, what is the original price of this book? A commodity is sold at a 20% discount, which is 84% cheaper.
(1)1-95% = 5% 8 ÷ 5% = 8 ÷ 0.05 = 160 (yuan) A: The original price of this book is160 yuan.
(2)1-80% = 20% 84 ÷ 20% = 84 ÷ 0.2 = 420 (yuan) A: The original price of this book is 420 yuan.