40% is the change from 445 to 623
Calculation steps:
[( 623 - 445 ) ÷ 445] x 100 = 40%
Formula
Percentage change = [(623 - 445) / 445] x 100
Subtract the new number by the original number
623 - 445 = 178
178 ÷ 445 = 0.4
0.4 x 100 = 40%
Example