-92.17% is the change from 817 to 64
Calculation steps:
[( 64 - 817 ) ÷ 817] x 100 = -92.17%
Formula
Percentage change = [(64 - 817) / 817] x 100
Subtract the new number by the original number
64 - 817 = -753
-753 ÷ 817 = -0.9216646266829865
-0.9216646266829865 x 100 = -92.17%