-93.55% is the change from 651 to 42
Calculation steps:
[( 42 - 651 ) ÷ 651] x 100 = -93.55%
Formula
Percentage change = [(42 - 651) / 651] x 100
Subtract the new number by the original number
42 - 651 = -609
-609 ÷ 651 = -0.9354838709677419
-0.9354838709677419 x 100 = -93.55%