-82.59% is the change from 850 to 148
Calculation steps:
[( 148 - 850 ) ÷ 850] x 100 = -82.59%
Formula
Percentage change = [(148 - 850) / 850] x 100
Subtract the new number by the original number
148 - 850 = -702
-702 ÷ 850 = -0.8258823529411765
-0.8258823529411765 x 100 = -82.59%