-96.67% is the change from 661 to 22
Calculation steps:
[( 22 - 661 ) ÷ 661] x 100 = -96.67%
Formula
Percentage change = [(22 - 661) / 661] x 100
Subtract the new number by the original number
22 - 661 = -639
-639 ÷ 661 = -0.9667170953101362
-0.9667170953101362 x 100 = -96.67%