-79.96% is the change from 454 to 91
Calculation steps:
[( 91 - 454 ) ÷ 454] x 100 = -79.96%
Formula
Percentage change = [(91 - 454) / 454] x 100
Subtract the new number by the original number
91 - 454 = -363
-363 ÷ 454 = -0.7995594713656388
-0.7995594713656388 x 100 = -79.96%