-84.73% is the change from 419 to 64
Calculation steps:
[( 64 - 419 ) ÷ 419] x 100 = -84.73%
Formula
Percentage change = [(64 - 419) / 419] x 100
Subtract the new number by the original number
64 - 419 = -355
-355 ÷ 419 = -0.847255369928401
-0.847255369928401 x 100 = -84.73%