-93.53% is the change from 649 to 42
Calculation steps:
[( 42 - 649 ) ÷ 649] x 100 = -93.53%
Formula
Percentage change = [(42 - 649) / 649] x 100
Subtract the new number by the original number
42 - 649 = -607
-607 ÷ 649 = -0.9352850539291218
-0.9352850539291218 x 100 = -93.53%