-1.89% is the change from 634 to 622
Calculation steps:
[( 622 - 634 ) ÷ 634] x 100 = -1.89%
Formula
Percentage change = [(622 - 634) / 634] x 100
Subtract the new number by the original number
622 - 634 = -12
-12 ÷ 634 = -0.01892744479495268
-0.01892744479495268 x 100 = -1.89%