-67.96% is the change from 646 to 207
Calculation steps:
[( 207 - 646 ) ÷ 646] x 100 = -67.96%
Formula
Percentage change = [(207 - 646) / 646] x 100
Subtract the new number by the original number
207 - 646 = -439
-439 ÷ 646 = -0.6795665634674922
-0.6795665634674922 x 100 = -67.96%