Lovely cuts her birthday cake into 12 equal pieces. Only one-fourth of the cake was eaten by her visitors and the rest were kept. How many slices of cake were kept? Give me reasons, before answering the question
12 / 4 = 3 slices of cake were eaten by Lovely's visitors. So, 12 - 3 = 9 slices of cake were kept. So the final answer is 9.