-20.61% is the change from 655 to 520
Calculation steps:
[( 520 - 655 ) ÷ 655] x 100 = -20.61%
Formula
Percentage change = [(520 - 655) / 655] x 100
Subtract the new number by the original number
520 - 655 = -135
-135 ÷ 655 = -0.20610687022900764
-0.20610687022900764 x 100 = -20.61%