-74.79% is the change from 853 to 215
Calculation steps:
[( 215 - 853 ) ÷ 853] x 100 = -74.79%
Formula
Percentage change = [(215 - 853) / 853] x 100
Subtract the new number by the original number
215 - 853 = -638
-638 ÷ 853 = -0.7479484173505275
-0.7479484173505275 x 100 = -74.79%