-84.58% is the change from 428 to 66
Calculation steps:
[( 66 - 428 ) ÷ 428] x 100 = -84.58%
Formula
Percentage change = [(66 - 428) / 428] x 100
Subtract the new number by the original number
66 - 428 = -362
-362 ÷ 428 = -0.8457943925233645
-0.8457943925233645 x 100 = -84.58%