-1.9% is the change from 632 to 620
Calculation steps:
[( 620 - 632 ) ÷ 632] x 100 = -1.9%
Formula
Percentage change = [(620 - 632) / 632] x 100
Subtract the new number by the original number
620 - 632 = -12
-12 ÷ 632 = -0.0189873417721519
-0.0189873417721519 x 100 = -1.9%