-19.19% is the change from 620 to 501
Calculation steps:
[( 501 - 620 ) ÷ 620] x 100 = -19.19%
Formula
Percentage change = [(501 - 620) / 620] x 100
Subtract the new number by the original number
501 - 620 = -119
-119 ÷ 620 = -0.19193548387096773
-0.19193548387096773 x 100 = -19.19%