-21.83% is the change from 655 to 512
Calculation steps:
[( 512 - 655 ) ÷ 655] x 100 = -21.83%
Formula
Percentage change = [(512 - 655) / 655] x 100
Subtract the new number by the original number
512 - 655 = -143
-143 ÷ 655 = -0.2183206106870229
-0.2183206106870229 x 100 = -21.83%