-63.83% is the change from 611 to 221
Calculation steps:
[( 221 - 611 ) ÷ 611] x 100 = -63.83%
Formula
Percentage change = [(221 - 611) / 611] x 100
Subtract the new number by the original number
221 - 611 = -390
-390 ÷ 611 = -0.6382978723404256
-0.6382978723404256 x 100 = -63.83%