-70.2% is the change from 661 to 197
Calculation steps:
[( 197 - 661 ) ÷ 661] x 100 = -70.2%
Formula
Percentage change = [(197 - 661) / 661] x 100
Subtract the new number by the original number
197 - 661 = -464
-464 ÷ 661 = -0.7019667170953101
-0.7019667170953101 x 100 = -70.2%