-21.29% is the change from 620 to 488
Calculation steps:
[( 488 - 620 ) ÷ 620] x 100 = -21.29%
Formula
Percentage change = [(488 - 620) / 620] x 100
Subtract the new number by the original number
488 - 620 = -132
-132 ÷ 620 = -0.2129032258064516
-0.2129032258064516 x 100 = -21.29%