-57.8% is the change from 545 to 230
Calculation steps:
[( 230 - 545 ) ÷ 545] x 100 = -57.8%
Formula
Percentage change = [(230 - 545) / 545] x 100
Subtract the new number by the original number
230 - 545 = -315
-315 ÷ 545 = -0.5779816513761468
-0.5779816513761468 x 100 = -57.8%