-83.08% is the change from 455 to 77
Calculation steps:
[( 77 - 455 ) ÷ 455] x 100 = -83.08%
Formula
Percentage change = [(77 - 455) / 455] x 100
Subtract the new number by the original number
77 - 455 = -378
-378 ÷ 455 = -0.8307692307692308
-0.8307692307692308 x 100 = -83.08%