-93.02% is the change from 817 to 57
Calculation steps:
[( 57 - 817 ) ÷ 817] x 100 = -93.02%
Formula
Percentage change = [(57 - 817) / 817] x 100
Subtract the new number by the original number
57 - 817 = -760
-760 ÷ 817 = -0.9302325581395349
-0.9302325581395349 x 100 = -93.02%