-25.72% is the change from 661 to 491
Calculation steps:
[( 491 - 661 ) ÷ 661] x 100 = -25.72%
Formula
Percentage change = [(491 - 661) / 661] x 100
Subtract the new number by the original number
491 - 661 = -170
-170 ÷ 661 = -0.25718608169440244
-0.25718608169440244 x 100 = -25.72%