-77.83% is the change from 406 to 90
Calculation steps:
[( 90 - 406 ) ÷ 406] x 100 = -77.83%
Formula
Percentage change = [(90 - 406) / 406] x 100
Subtract the new number by the original number
90 - 406 = -316
-316 ÷ 406 = -0.7783251231527094
-0.7783251231527094 x 100 = -77.83%