-20.42% is the change from 661 to 526
Calculation steps:
[( 526 - 661 ) ÷ 661] x 100 = -20.42%
Formula
Percentage change = [(526 - 661) / 661] x 100
Subtract the new number by the original number
526 - 661 = -135
-135 ÷ 661 = -0.2042360060514372
-0.2042360060514372 x 100 = -20.42%