-40.4% is the change from 453 to 270
Calculation steps:
[( 270 - 453 ) ÷ 453] x 100 = -40.4%
Formula
Percentage change = [(270 - 453) / 453] x 100
Subtract the new number by the original number
270 - 453 = -183
-183 ÷ 453 = -0.40397350993377484
-0.40397350993377484 x 100 = -40.4%