-21.18% is the change from 543 to 428
Calculation steps:
[( 428 - 543 ) ÷ 543] x 100 = -21.18%
Formula
Percentage change = [(428 - 543) / 543] x 100
Subtract the new number by the original number
428 - 543 = -115
-115 ÷ 543 = -0.21178637200736647
-0.21178637200736647 x 100 = -21.18%