-83.62% is the change from 403 to 66
Calculation steps:
[( 66 - 403 ) ÷ 403] x 100 = -83.62%
Formula
Percentage change = [(66 - 403) / 403] x 100
Subtract the new number by the original number
66 - 403 = -337
-337 ÷ 403 = -0.8362282878411911
-0.8362282878411911 x 100 = -83.62%