-18.07% is the change from 642 to 526
Calculation steps:
[( 526 - 642 ) ÷ 642] x 100 = -18.07%
Formula
Percentage change = [(526 - 642) / 642] x 100
Subtract the new number by the original number
526 - 642 = -116
-116 ÷ 642 = -0.1806853582554517
-0.1806853582554517 x 100 = -18.07%