-73.29% is the change from 850 to 227
Calculation steps:
[( 227 - 850 ) ÷ 850] x 100 = -73.29%
Formula
Percentage change = [(227 - 850) / 850] x 100
Subtract the new number by the original number
227 - 850 = -623
-623 ÷ 850 = -0.7329411764705882
-0.7329411764705882 x 100 = -73.29%