-2.1% is the change from 620 to 607
Calculation steps:
[( 607 - 620 ) ÷ 620] x 100 = -2.1%
Formula
Percentage change = [(607 - 620) / 620] x 100
Subtract the new number by the original number
607 - 620 = -13
-13 ÷ 620 = -0.020967741935483872
-0.020967741935483872 x 100 = -2.1%