-96.59% is the change from 646 to 22
Calculation steps:
[( 22 - 646 ) ÷ 646] x 100 = -96.59%
Formula
Percentage change = [(22 - 646) / 646] x 100
Subtract the new number by the original number
22 - 646 = -624
-624 ÷ 646 = -0.9659442724458205
-0.9659442724458205 x 100 = -96.59%