-70.9% is the change from 811 to 236
Calculation steps:
[( 236 - 811 ) ÷ 811] x 100 = -70.9%
Formula
Percentage change = [(236 - 811) / 811] x 100
Subtract the new number by the original number
236 - 811 = -575
-575 ÷ 811 = -0.7090012330456227
-0.7090012330456227 x 100 = -70.9%