-81.06% is the change from 417 to 79
Calculation steps:
[( 79 - 417 ) ÷ 417] x 100 = -81.06%
Formula
Percentage change = [(79 - 417) / 417] x 100
Subtract the new number by the original number
79 - 417 = -338
-338 ÷ 417 = -0.8105515587529976
-0.8105515587529976 x 100 = -81.06%