-77.1% is the change from 620 to 142
Calculation steps:
[( 142 - 620 ) ÷ 620] x 100 = -77.1%
Formula
Percentage change = [(142 - 620) / 620] x 100
Subtract the new number by the original number
142 - 620 = -478
-478 ÷ 620 = -0.7709677419354839
-0.7709677419354839 x 100 = -77.1%