-22.9% is the change from 655 to 505
Calculation steps:
[( 505 - 655 ) ÷ 655] x 100 = -22.9%
Formula
Percentage change = [(505 - 655) / 655] x 100
Subtract the new number by the original number
505 - 655 = -150
-150 ÷ 655 = -0.22900763358778625
-0.22900763358778625 x 100 = -22.9%