-98.72% is the change from 545 to 7
Calculation steps:
[( 7 - 545 ) ÷ 545] x 100 = -98.72%
Formula
Percentage change = [(7 - 545) / 545] x 100
Subtract the new number by the original number
7 - 545 = -538
-538 ÷ 545 = -0.9871559633027523
-0.9871559633027523 x 100 = -98.72%