Answer:
Tiffany is 34% closer to the school.
Step-by-step explanation:
Given the statement: Tiffany used to live 15 kilometers away from the school, but after she moved she now lives 9.9 kilometers away.
She lived away from the school = 15 km
as, she moved 9.9 km away.
Now, the distance closer to school from where she lived = 15 -9.9 = 5.1 km
To, find how much percent she is closer to school.
Percent states that a number or ratio expressed as a fraction of 100.
= ![\frac{51 \times 100}{150} = \frac{51 \times 10}{15}](https://tex.z-dn.net/?f=%5Cfrac%7B51%20%5Ctimes%20100%7D%7B150%7D%20%3D%20%5Cfrac%7B51%20%5Ctimes%2010%7D%7B15%7D)
Simplify:
percent closer to school = 34%
Therefore, she is 34% closer to the school.