-14.07% is the change from 455 to 391
Calculation steps:
[( 391 - 455 ) ÷ 455] x 100 = -14.07%
Formula
Percentage change = [(391 - 455) / 455] x 100
Subtract the new number by the original number
391 - 455 = -64
-64 ÷ 455 = -0.14065934065934066
-0.14065934065934066 x 100 = -14.07%