-61.7% is the change from 577 to 221
Calculation steps:
[( 221 - 577 ) ÷ 577] x 100 = -61.7%
Formula
Percentage change = [(221 - 577) / 577] x 100
Subtract the new number by the original number
221 - 577 = -356
-356 ÷ 577 = -0.6169844020797227
-0.6169844020797227 x 100 = -61.7%