Respuesta :
Answer:
30% increase.
Step-by-step explanation:
Increased cost = final cost - initial cost
Increased cost = 39 - 30
Increased cost = 9
Percent increase from initial cost is given by,
Percent increase = ( Increased cost / initial cost ) * 100%
Percent increase = ( 9 / 30 ) * 100%
Percent increase = 30%
Answer:30% increase
Step-by-step explanation:
(39-30)/30 × 100
9/30×100=(9×100)/30=900/30=30