-90.36% is the change from 83 to 8
Calculation steps:
[( 8 - 83 ) ÷ 83] x 100 = -90.36%
Formula
Percentage change = [(8 - 83) / 83] x 100
Subtract the new number by the original number
8 - 83 = -75
-75 ÷ 83 = -0.9036144578313253
-0.9036144578313253 x 100 = -90.36%