300% is the change from 225 to 900
Calculation steps:
[( 900 - 225 ) ÷ 225] x 100 = 300%
Formula
Percentage change = [(900 - 225) / 225] x 100
Subtract the new number by the original number
900 - 225 = 675
675 ÷ 225 = 3
3 x 100 = 300%
Example