-77.74% is the change from 620 to 138
Calculation steps:
[( 138 - 620 ) ÷ 620] x 100 = -77.74%
Formula
Percentage change = [(138 - 620) / 620] x 100
Subtract the new number by the original number
138 - 620 = -482
-482 ÷ 620 = -0.7774193548387097
-0.7774193548387097 x 100 = -77.74%