-67.79% is the change from 857 to 276
Calculation steps:
[( 276 - 857 ) ÷ 857] x 100 = -67.79%
Formula
Percentage change = [(276 - 857) / 857] x 100
Subtract the new number by the original number
276 - 857 = -581
-581 ÷ 857 = -0.6779463243873979
-0.6779463243873979 x 100 = -67.79%