-22.09% is the change from 661 to 515
Calculation steps:
[( 515 - 661 ) ÷ 661] x 100 = -22.09%
Formula
Percentage change = [(515 - 661) / 661] x 100
Subtract the new number by the original number
515 - 661 = -146
-146 ÷ 661 = -0.22087745839636913
-0.22087745839636913 x 100 = -22.09%