-21.37% is the change from 655 to 515
Calculation steps:
[( 515 - 655 ) ÷ 655] x 100 = -21.37%
Formula
Percentage change = [(515 - 655) / 655] x 100
Subtract the new number by the original number
515 - 655 = -140
-140 ÷ 655 = -0.21374045801526717
-0.21374045801526717 x 100 = -21.37%