Answer:
The percent change would be a 300% change
Explanation:
$75 to $75 would have been a 0% change as there was no change
$75 to $150 would be an 100% change as you doubled the money amount
$75 to $225 would be an 200% change as you tripled the money
$75 to $300 would be a 300% change as you triple the amount of money