-3.06% is the change from 620 to 601
Calculation steps:
[( 601 - 620 ) ÷ 620] x 100 = -3.06%
Formula
Percentage change = [(601 - 620) / 620] x 100
Subtract the new number by the original number
601 - 620 = -19
-19 ÷ 620 = -0.03064516129032258
-0.03064516129032258 x 100 = -3.06%