-97.6% is the change from 542 to 13
Calculation steps:
[( 13 - 542 ) ÷ 542] x 100 = -97.6%
Formula
Percentage change = [(13 - 542) / 542] x 100
Subtract the new number by the original number
13 - 542 = -529
-529 ÷ 542 = -0.9760147601476015
-0.9760147601476015 x 100 = -97.6%