-73.61% is the change from 648 to 171
Calculation steps:
[( 171 - 648 ) ÷ 648] x 100 = -73.61%
Formula
Percentage change = [(171 - 648) / 648] x 100
Subtract the new number by the original number
171 - 648 = -477
-477 ÷ 648 = -0.7361111111111112
-0.7361111111111112 x 100 = -73.61%