-85.93% is the change from 455 to 64
Calculation steps:
[( 64 - 455 ) ÷ 455] x 100 = -85.93%
Formula
Percentage change = [(64 - 455) / 455] x 100
Subtract the new number by the original number
64 - 455 = -391
-391 ÷ 455 = -0.8593406593406593
-0.8593406593406593 x 100 = -85.93%