-83.99% is the change from 406 to 65
Calculation steps:
[( 65 - 406 ) ÷ 406] x 100 = -83.99%
Formula
Percentage change = [(65 - 406) / 406] x 100
Subtract the new number by the original number
65 - 406 = -341
-341 ÷ 406 = -0.8399014778325123
-0.8399014778325123 x 100 = -83.99%