-92.11% is the change from 811 to 64
Calculation steps:
[( 64 - 811 ) ÷ 811] x 100 = -92.11%
Formula
Percentage change = [(64 - 811) / 811] x 100
Subtract the new number by the original number
64 - 811 = -747
-747 ÷ 811 = -0.9210850801479655
-0.9210850801479655 x 100 = -92.11%