-70.63% is the change from 664 to 195
Calculation steps:
[( 195 - 664 ) ÷ 664] x 100 = -70.63%
Formula
Percentage change = [(195 - 664) / 664] x 100
Subtract the new number by the original number
195 - 664 = -469
-469 ÷ 664 = -0.7063253012048193
-0.7063253012048193 x 100 = -70.63%