-65.57% is the change from 610 to 210
Calculation steps:
[( 210 - 610 ) ÷ 610] x 100 = -65.57%
Formula
Percentage change = [(210 - 610) / 610] x 100
Subtract the new number by the original number
210 - 610 = -400
-400 ÷ 610 = -0.6557377049180327
-0.6557377049180327 x 100 = -65.57%