-74.05% is the change from 817 to 212
Calculation steps:
[( 212 - 817 ) ÷ 817] x 100 = -74.05%
Formula
Percentage change = [(212 - 817) / 817] x 100
Subtract the new number by the original number
212 - 817 = -605
-605 ÷ 817 = -0.7405140758873929
-0.7405140758873929 x 100 = -74.05%