-22.75% is the change from 655 to 506
Calculation steps:
[( 506 - 655 ) ÷ 655] x 100 = -22.75%
Formula
Percentage change = [(506 - 655) / 655] x 100
Subtract the new number by the original number
506 - 655 = -149
-149 ÷ 655 = -0.22748091603053436
-0.22748091603053436 x 100 = -22.75%