-74.56% is the change from 845 to 215
Calculation steps:
[( 215 - 845 ) ÷ 845] x 100 = -74.56%
Formula
Percentage change = [(215 - 845) / 845] x 100
Subtract the new number by the original number
215 - 845 = -630
-630 ÷ 845 = -0.7455621301775148
-0.7455621301775148 x 100 = -74.56%