-21.98% is the change from 655 to 511
Calculation steps:
[( 511 - 655 ) ÷ 655] x 100 = -21.98%
Formula
Percentage change = [(511 - 655) / 655] x 100
Subtract the new number by the original number
511 - 655 = -144
-144 ÷ 655 = -0.2198473282442748
-0.2198473282442748 x 100 = -21.98%