-74.88% is the change from 856 to 215
Calculation steps:
[( 215 - 856 ) ÷ 856] x 100 = -74.88%
Formula
Percentage change = [(215 - 856) / 856] x 100
Subtract the new number by the original number
215 - 856 = -641
-641 ÷ 856 = -0.7488317757009346
-0.7488317757009346 x 100 = -74.88%