-77.42% is the change from 620 to 140
Calculation steps:
[( 140 - 620 ) ÷ 620] x 100 = -77.42%
Formula
Percentage change = [(140 - 620) / 620] x 100
Subtract the new number by the original number
140 - 620 = -480
-480 ÷ 620 = -0.7741935483870968
-0.7741935483870968 x 100 = -77.42%