-30.48% is the change from 620 to 431
Calculation steps:
[( 431 - 620 ) ÷ 620] x 100 = -30.48%
Formula
Percentage change = [(431 - 620) / 620] x 100
Subtract the new number by the original number
431 - 620 = -189
-189 ÷ 620 = -0.30483870967741933
-0.30483870967741933 x 100 = -30.48%