-79.12% is the change from 431 to 90
Calculation steps:
[( 90 - 431 ) ÷ 431] x 100 = -79.12%
Formula
Percentage change = [(90 - 431) / 431] x 100
Subtract the new number by the original number
90 - 431 = -341
-341 ÷ 431 = -0.7911832946635731
-0.7911832946635731 x 100 = -79.12%