-18.69% is the change from 642 to 522
Calculation steps:
[( 522 - 642 ) ÷ 642] x 100 = -18.69%
Formula
Percentage change = [(522 - 642) / 642] x 100
Subtract the new number by the original number
522 - 642 = -120
-120 ÷ 642 = -0.18691588785046728
-0.18691588785046728 x 100 = -18.69%