In January, 2 liters of lemonade were sold for CZK 24, while in February, 2.5 liters of lemonade sold at same price. How much percent was 1 liter of lemonade cheaper in February than in January?

Correct answer:

p =  20 %

Step-by-step explanation:

c1=24/2=12 Kc/l c2=24/2.5=485=9.6 Kc/l p=100 c1c2c1=100 129.612=20%

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