-20.48% is the change from 620 to 493
Calculation steps:
[( 493 - 620 ) ÷ 620] x 100 = -20.48%
Formula
Percentage change = [(493 - 620) / 620] x 100
Subtract the new number by the original number
493 - 620 = -127
-127 ÷ 620 = -0.20483870967741935
-0.20483870967741935 x 100 = -20.48%