-85.05% is the change from 428 to 64
Calculation steps:
[( 64 - 428 ) ÷ 428] x 100 = -85.05%
Formula
Percentage change = [(64 - 428) / 428] x 100
Subtract the new number by the original number
64 - 428 = -364
-364 ÷ 428 = -0.8504672897196262
-0.8504672897196262 x 100 = -85.05%