-61.41% is the change from 850 to 328
Calculation steps:
[( 328 - 850 ) ÷ 850] x 100 = -61.41%
Formula
Percentage change = [(328 - 850) / 850] x 100
Subtract the new number by the original number
328 - 850 = -522
-522 ÷ 850 = -0.6141176470588235
-0.6141176470588235 x 100 = -61.41%