-2.85% is the change from 631 to 613
Calculation steps:
[( 613 - 631 ) ÷ 631] x 100 = -2.85%
Formula
Percentage change = [(613 - 631) / 631] x 100
Subtract the new number by the original number
613 - 631 = -18
-18 ÷ 631 = -0.028526148969889066
-0.028526148969889066 x 100 = -2.85%