-18.22% is the change from 642 to 525
Calculation steps:
[( 525 - 642 ) ÷ 642] x 100 = -18.22%
Formula
Percentage change = [(525 - 642) / 642] x 100
Subtract the new number by the original number
525 - 642 = -117
-117 ÷ 642 = -0.1822429906542056
-0.1822429906542056 x 100 = -18.22%