-96.57% is the change from 642 to 22
Calculation steps:
[( 22 - 642 ) ÷ 642] x 100 = -96.57%
Formula
Percentage change = [(22 - 642) / 642] x 100
Subtract the new number by the original number
22 - 642 = -620
-620 ÷ 642 = -0.9657320872274143
-0.9657320872274143 x 100 = -96.57%