-71.41% is the change from 850 to 243
Calculation steps:
[( 243 - 850 ) ÷ 850] x 100 = -71.41%
Formula
Percentage change = [(243 - 850) / 850] x 100
Subtract the new number by the original number
243 - 850 = -607
-607 ÷ 850 = -0.7141176470588235
-0.7141176470588235 x 100 = -71.41%