-78.9% is the change from 545 to 115
Calculation steps:
[( 115 - 545 ) ÷ 545] x 100 = -78.9%
Formula
Percentage change = [(115 - 545) / 545] x 100
Subtract the new number by the original number
115 - 545 = -430
-430 ÷ 545 = -0.7889908256880734
-0.7889908256880734 x 100 = -78.9%