Tiffany used to live 15 kilometers away from the school, but after she moved she now lives 9.9 kilometers away. Is this an increase or decrease?

it is a decrease

Step-by-step explanation:

hope that this helps

also why is this question so easy for a high schooler im in middle school and was able to figure it out

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

yeeeet

8 < i think

hope this !