Step-by-step explanation:
The formula for this would be:
New value - Old value
Then divide the answer by the old value
Finally multiply it by 100
So it should be $400 - $350 which is $50
Then $50 ÷ $400 which is 0.125
Finally do 0.125 × 100 which is 12.5
So there has been a 12.5% increase
Hope this helps and/or makes sense!
