-39.78% is the change from 455 to 274
Calculation steps:
[( 274 - 455 ) ÷ 455] x 100 = -39.78%
Formula
Percentage change = [(274 - 455) / 455] x 100
Subtract the new number by the original number
274 - 455 = -181
-181 ÷ 455 = -0.3978021978021978
-0.3978021978021978 x 100 = -39.78%