-73.42% is the change from 647 to 172
Calculation steps:
[( 172 - 647 ) ÷ 647] x 100 = -73.42%
Formula
Percentage change = [(172 - 647) / 647] x 100
Subtract the new number by the original number
172 - 647 = -475
-475 ÷ 647 = -0.7341576506955177
-0.7341576506955177 x 100 = -73.42%