-15.81% is the change from 620 to 522
Calculation steps:
[( 522 - 620 ) ÷ 620] x 100 = -15.81%
Formula
Percentage change = [(522 - 620) / 620] x 100
Subtract the new number by the original number
522 - 620 = -98
-98 ÷ 620 = -0.15806451612903225
-0.15806451612903225 x 100 = -15.81%