-97.66% is the change from 555 to 13
Calculation steps:
[( 13 - 555 ) ÷ 555] x 100 = -97.66%
Formula
Percentage change = [(13 - 555) / 555] x 100
Subtract the new number by the original number
13 - 555 = -542
-542 ÷ 555 = -0.9765765765765766
-0.9765765765765766 x 100 = -97.66%