-94.99% is the change from 839 to 42
Calculation steps:
[( 42 - 839 ) ÷ 839] x 100 = -94.99%
Formula
Percentage change = [(42 - 839) / 839] x 100
Subtract the new number by the original number
42 - 839 = -797
-797 ÷ 839 = -0.9499404052443385
-0.9499404052443385 x 100 = -94.99%