-37.8% is the change from 455 to 283
Calculation steps:
[( 283 - 455 ) ÷ 455] x 100 = -37.8%
Formula
Percentage change = [(283 - 455) / 455] x 100
Subtract the new number by the original number
283 - 455 = -172
-172 ÷ 455 = -0.378021978021978
-0.378021978021978 x 100 = -37.8%