84900% is the change from 1 to 850
Calculation steps:
[( 850 - 1 ) ÷ 1] x 100 = 84900%
Formula
Percentage change = [(850 - 1) / 1] x 100
Subtract the new number by the original number
850 - 1 = 849
849 ÷ 1 = 849
849 x 100 = 84900%
Example