-3.11% is the change from 610 to 591
Calculation steps:
[( 591 - 610 ) ÷ 610] x 100 = -3.11%
Formula
Percentage change = [(591 - 610) / 610] x 100
Subtract the new number by the original number
591 - 610 = -19
-19 ÷ 610 = -0.03114754098360656
-0.03114754098360656 x 100 = -3.11%