-94.83% is the change from 813 to 42
Calculation steps:
[( 42 - 813 ) ÷ 813] x 100 = -94.83%
Formula
Percentage change = [(42 - 813) / 813] x 100
Subtract the new number by the original number
42 - 813 = -771
-771 ÷ 813 = -0.948339483394834
-0.948339483394834 x 100 = -94.83%