-82.49% is the change from 811 to 142
Calculation steps:
[( 142 - 811 ) ÷ 811] x 100 = -82.49%
Formula
Percentage change = [(142 - 811) / 811] x 100
Subtract the new number by the original number
142 - 811 = -669
-669 ÷ 811 = -0.8249075215782984
-0.8249075215782984 x 100 = -82.49%