Respuesta :

neonlightningboltz

Answer:

neon: 0 percent change    oxide: -2 percent change   copper: 2 percent change   tin: 0 percent change

Step-by-step explanation:

Neon: -10+10=0

Oxide: -10+8=-2

Copper: -27+29=2

Tin: -50+50=0

Hope this helps