-10.59% is the change from 661 to 591
Calculation steps:
[( 591 - 661 ) ÷ 661] x 100 = -10.59%
Formula
Percentage change = [(591 - 661) / 661] x 100
Subtract the new number by the original number
591 - 661 = -70
-70 ÷ 661 = -0.1059001512859304
-0.1059001512859304 x 100 = -10.59%