Answer: 144.28 centimeters
Explanation:
The height of Louisa = 152.7 centimeters
The difference in Louisa and her younger sister = 8.42 centimeters
Therefore, the height of her younger sister =
centimeters
Thus, the height of her younger sister = 144.28 centimeters
Hence, Louisa's younger sister is 144.28 centimeters tall.