-80.9% is the change from 534 to 102
Calculation steps:
[( 102 - 534 ) ÷ 534] x 100 = -80.9%
Formula
Percentage change = [(102 - 534) / 534] x 100
Subtract the new number by the original number
102 - 534 = -432
-432 ÷ 534 = -0.8089887640449438
-0.8089887640449438 x 100 = -80.9%