-81.71% is the change from 492 to 90
Calculation steps:
[( 90 - 492 ) ÷ 492] x 100 = -81.71%
Formula
Percentage change = [(90 - 492) / 492] x 100
Subtract the new number by the original number
90 - 492 = -402
-402 ÷ 492 = -0.8170731707317073
-0.8170731707317073 x 100 = -81.71%