-75.61% is the change from 857 to 209
Calculation steps:
[( 209 - 857 ) ÷ 857] x 100 = -75.61%
Formula
Percentage change = [(209 - 857) / 857] x 100
Subtract the new number by the original number
209 - 857 = -648
-648 ÷ 857 = -0.7561260210035006
-0.7561260210035006 x 100 = -75.61%