-73.4% is the change from 857 to 228
Calculation steps:
[( 228 - 857 ) ÷ 857] x 100 = -73.4%
Formula
Percentage change = [(228 - 857) / 857] x 100
Subtract the new number by the original number
228 - 857 = -629
-629 ÷ 857 = -0.733955659276546
-0.733955659276546 x 100 = -73.4%