-63.93% is the change from 610 to 220
Calculation steps:
[( 220 - 610 ) ÷ 610] x 100 = -63.93%
Formula
Percentage change = [(220 - 610) / 610] x 100
Subtract the new number by the original number
220 - 610 = -390
-390 ÷ 610 = -0.639344262295082
-0.639344262295082 x 100 = -63.93%