-63.77% is the change from 610 to 221
Calculation steps:
[( 221 - 610 ) ÷ 610] x 100 = -63.77%
Formula
Percentage change = [(221 - 610) / 610] x 100
Subtract the new number by the original number
221 - 610 = -389
-389 ÷ 610 = -0.6377049180327868
-0.6377049180327868 x 100 = -63.77%