-85.45% is the change from 543 to 79
Calculation steps:
[( 79 - 543 ) ÷ 543] x 100 = -85.45%
Formula
Percentage change = [(79 - 543) / 543] x 100
Subtract the new number by the original number
79 - 543 = -464
-464 ÷ 543 = -0.85451197053407
-0.85451197053407 x 100 = -85.45%