-67.75% is the change from 648 to 209
Calculation steps:
[( 209 - 648 ) ÷ 648] x 100 = -67.75%
Formula
Percentage change = [(209 - 648) / 648] x 100
Subtract the new number by the original number
209 - 648 = -439
-439 ÷ 648 = -0.6774691358024691
-0.6774691358024691 x 100 = -67.75%