-64.41% is the change from 857 to 305
Calculation steps:
[( 305 - 857 ) ÷ 857] x 100 = -64.41%
Formula
Percentage change = [(305 - 857) / 857] x 100
Subtract the new number by the original number
305 - 857 = -552
-552 ÷ 857 = -0.6441073512252042
-0.6441073512252042 x 100 = -64.41%