-79.62% is the change from 417 to 85
Calculation steps:
[( 85 - 417 ) ÷ 417] x 100 = -79.62%
Formula
Percentage change = [(85 - 417) / 417] x 100
Subtract the new number by the original number
85 - 417 = -332
-332 ÷ 417 = -0.7961630695443646
-0.7961630695443646 x 100 = -79.62%