-3.71% is the change from 620 to 597
Calculation steps:
[( 597 - 620 ) ÷ 620] x 100 = -3.71%
Formula
Percentage change = [(597 - 620) / 620] x 100
Subtract the new number by the original number
597 - 620 = -23
-23 ÷ 620 = -0.037096774193548385
-0.037096774193548385 x 100 = -3.71%