Respuesta :
Answer:
50% increase
Step-by-step explanation:
Percentage change = increase/original × 100
[tex]change = \frac{(18 - 12)}{12} \times 100[/tex]
[tex]change = \frac{6}{12} \times 100[/tex]
[tex]change = 0.5 \times 100[/tex]
[tex]change = 50\%[/tex]