The ratio of the Jia Yee's apples to Hye Ying's apples is 4 : 7.Jia Yee has 12 apples.How many apples does Hye Ying have? apples.

To solve this problem, we need to understand that the ratio given represents the relationship between the number of apples Jia Yee has and the number of apples Hye Ying has.

Step 1: Identify the ratio. The ratio is 4:7, which means for every 4 apples Jia Yee has, Hye Ying has 7 apples.

Step 2: Identify the known quantity. We know that Jia Yee has 12 apples.

Step 3: Determine the value of a single unit in the ratio. To do this, divide the number of apples Jia Yee has (12) by her part of the ratio (4). So, 12 ÷ 4 = 3. This means that each unit in the ratio represents 3 apples.

Step 4: Calculate the number of apples Hye Ying has. Multiply Hye Ying's part of the ratio (7) by the value of a single unit in the ratio (3). So, 7 x 3 = 21.

Therefore, Hye Ying has 21 apples.