400% is the change from 45 to 225
Calculation steps:
[( 225 - 45 ) ÷ 45] x 100 = 400%
Formula
Percentage change = [(225 - 45) / 45] x 100
Subtract the new number by the original number
225 - 45 = 180
180 ÷ 45 = 4
4 x 100 = 400%
Example