-77.58% is the change from 620 to 139
Calculation steps:
[( 139 - 620 ) ÷ 620] x 100 = -77.58%
Formula
Percentage change = [(139 - 620) / 620] x 100
Subtract the new number by the original number
139 - 620 = -481
-481 ÷ 620 = -0.7758064516129032
-0.7758064516129032 x 100 = -77.58%