-94.86% is the change from 817 to 42
Calculation steps:
[( 42 - 817 ) ÷ 817] x 100 = -94.86%
Formula
Percentage change = [(42 - 817) / 817] x 100
Subtract the new number by the original number
42 - 817 = -775
-775 ÷ 817 = -0.9485924112607099
-0.9485924112607099 x 100 = -94.86%