-30.98% is the change from 610 to 421
Calculation steps:
[( 421 - 610 ) ÷ 610] x 100 = -30.98%
Formula
Percentage change = [(421 - 610) / 610] x 100
Subtract the new number by the original number
421 - 610 = -189
-189 ÷ 610 = -0.30983606557377047
-0.30983606557377047 x 100 = -30.98%