-3.16% is the change from 632 to 612
Calculation steps:
[( 612 - 632 ) ÷ 632] x 100 = -3.16%
Formula
Percentage change = [(612 - 632) / 632] x 100
Subtract the new number by the original number
612 - 632 = -20
-20 ÷ 632 = -0.03164556962025317
-0.03164556962025317 x 100 = -3.16%