-67.83% is the change from 687 to 221
Calculation steps:
[( 221 - 687 ) ÷ 687] x 100 = -67.83%
Formula
Percentage change = [(221 - 687) / 687] x 100
Subtract the new number by the original number
221 - 687 = -466
-466 ÷ 687 = -0.6783114992721979
-0.6783114992721979 x 100 = -67.83%