-96.93% is the change from 651 to 20
Calculation steps:
[( 20 - 651 ) ÷ 651] x 100 = -96.93%
Formula
Percentage change = [(20 - 651) / 651] x 100
Subtract the new number by the original number
20 - 651 = -631
-631 ÷ 651 = -0.9692780337941628
-0.9692780337941628 x 100 = -96.93%