-85.26% is the change from 285 to 42
Calculation steps:
[( 42 - 285 ) ÷ 285] x 100 = -85.26%
Formula
Percentage change = [(42 - 285) / 285] x 100
Subtract the new number by the original number
42 - 285 = -243
-243 ÷ 285 = -0.8526315789473684
-0.8526315789473684 x 100 = -85.26%