-29.8% is the change from 453 to 318
Calculation steps:
[( 318 - 453 ) ÷ 453] x 100 = -29.8%
Formula
Percentage change = [(318 - 453) / 453] x 100
Subtract the new number by the original number
318 - 453 = -135
-135 ÷ 453 = -0.2980132450331126
-0.2980132450331126 x 100 = -29.8%