320% is the change from 45 to 189
Calculation steps:
[( 189 - 45 ) ÷ 45] x 100 = 320%
Formula
Percentage change = [(189 - 45) / 45] x 100
Subtract the new number by the original number
189 - 45 = 144
144 ÷ 45 = 3.2
3.2 x 100 = 320%
Example