-98.71% is the change from 542 to 7
Calculation steps:
[( 7 - 542 ) ÷ 542] x 100 = -98.71%
Formula
Percentage change = [(7 - 542) / 542] x 100
Subtract the new number by the original number
7 - 542 = -535
-535 ÷ 542 = -0.9870848708487084
-0.9870848708487084 x 100 = -98.71%