6983.33% is the change from 12 to 850
Calculation steps:
[( 850 - 12 ) ÷ 12] x 100 = 6983.33%
Formula
Percentage change = [(850 - 12) / 12] x 100
Subtract the new number by the original number
850 - 12 = 838
838 ÷ 12 = 69.83333333333333
69.83333333333333 x 100 = 6983.33%